Prof Peter Collignon @CollignonPeter Twitter profile

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Prof Peter Collignon

@CollignonPeter

2 years

No statistical significant benefit for masks vs no masks in the results of a study in 123 schools in England which used masks and compared that to others that did not during the Delta wave of Covid.

Covid: Evidence on face masks in schools 'inconclusive'

Government admits uncertainty over whether face coverings will truly cut Covid spread.

www.bbc.com

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Prof Peter Collignon

@CollignonPeter

1 year

Finally a randomised study of N95 vs medical masks PCR confirmed COVID occurred in 52 of 497 (10.46%) participants in the medical mask group versus 47 of 507 (9.27%) in the N95 respirator group (hazard ratio [HR], 1.14 [95% CI, 0.77 to 1.69]).

Medical Masks Versus N95 Respirators for Preventing COVID-19 Among Health Care Workers: A Randomi...

Background: It is uncertain if medical masks offer similar protection against COVID-19 compared with N95 respirators. Objective: To determine whether medical masks are noninferior to N95 respirators...

www.acpjournals.org

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Prof Peter Collignon

@CollignonPeter

2 years

There is ongoing debate as to whether widespread use of N95 masks in the community would decrease infections more than surgical masks. There are no good studies that answer this question, but this data from Germany suggests that their widespread use in Bavaria didn’t help.

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Prof Peter Collignon

@CollignonPeter

2 years

Victorian government intends to extend the lockout of the unvaccinated throughout 2022. This is disproportionate to the risks the unvaccinated pose in a population that will reach at least 93 per cent two-dose coverage by year’s end.

Victorian government’s lengthy lockout of unvaccinated is an overreach

Barring the unvaccinated indefinitely from everyday life is disproportionate to the risks they pose in the population.

www.theage.com.au

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Prof Peter Collignon

@CollignonPeter

4 years

Epidemic curve for Australia tonight from Comm Health website. Still early but epidemic curve looks like its falling. Hopefully that fall will continue and what we are doing now will cause it to keep on falling.

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Prof Peter Collignon

@CollignonPeter

3 years

My views on how in Australia, with still little Covid transmission, good contact tracing and quarantining etc, is an effective and successful approach despite the dire predictions of some. Lockdown demands were wrong: Sydney shows how to fight COVID-19

Lockdown fantasies fail to keep up with reality

We need to be careful not to overreact – health advice and interventions must be consistent, predictable and sustainable.

www.smh.com.au

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Prof Peter Collignon

@CollignonPeter

2 years

For children (0-9yrs) much higher numbers admitted with influenza and pneumonia in NSW in 2017 compared to covid in 2021. For pneumonia plus flu, 124 ICU admission compared to 11 cases for covid Flu plus pneumonia admissions (2017) were 4,109 compared to 303 for covid (2021).

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Prof Peter Collignon

@CollignonPeter

2 years

Want to go out, but decrease you chances of getting Covid? Dine outside as much as possible. It was Cold in Canberra last night (6 C) but if you rug up and if restaurant has outside heaters, still very nice dinner.

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Prof Peter Collignon

@CollignonPeter

2 years

Lockdown toll: One in eight have new mental health condition

Lockdown toll: One in eight has new mental health condition

NSW Mental Health Commissioner Catherine Lourey told the Herald Australia will need to recruit from abroad to boost its depleted and exhausted mental health workforce, as demand outstrips supply for...

www.smh.com.au

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Prof Peter Collignon

@CollignonPeter

3 years

Norway lifts COVID-19 restrictions, despite under 70 per cent of population being fully vaccinated

Norway lifts COVID-19 restrictions after 561 days

The decision to no longer require social distancing will allow culture and sports venues to utilise their full capacity, while restaurants can fill up and nightclubs reopen.

www.abc.net.au

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Prof Peter Collignon

@CollignonPeter

4 years

Australia's epidemic curve. Better than flattened - a major fall from around Mar 27. But we are now seeing a low level lingering tail. This is why at least till the end of our winter we will need to limit crowd numbers and keep physical distancing rules.

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Prof Peter Collignon

@CollignonPeter

9 months

During COVID, Sweden did not enforce strict lockdown measures. Instead relied more on voluntary mitigation. Excess all-cause mortality rates indicate that Sweden experienced fewer deaths per population during the pandemic than most high-income countries

The Swedish COVID-19 approach: a scientific dialogue on mitigation policies - PubMed

During the COVID-19 pandemic, Sweden was among the few countries that did not enforce strict lockdown measures but instead relied more on voluntary and sustainable mitigation recommendations. While...

pubmed.ncbi.nlm.nih.gov

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Prof Peter Collignon

@CollignonPeter

4 years

Covid Patients Testing Positive After Recovery Aren’t Infectious, Study Shows

Researchers are finding evidence that patients who test positive for the coronavirus after recovering aren’t capable of transmitting the infection, and could have the antibodies that prevent them...

www.bloomberg.com

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Prof Peter Collignon

@CollignonPeter

4 years

Australia in latest figures has about 100 new cases per day, while NZ about 50 new cases per day. Both good by current world standards but Australia has 5 times the pop of NZ, so proportionately Australia is getting its epidemic curve lower and faster.

New Zealand isn’t just flattening the curve. It’s squashing it.

The number of new coronavirus cases is starting to decline as the country pursues a policy of elimination rather than containment.

www.washingtonpost.com

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Prof Peter Collignon

@CollignonPeter

2 years

Are N95 masks better than surgical masks? So far, not convincing evidence in this review There was no statistically significant difference in respirator or surgical mask effectiveness in preventing SARS-CoV-2 infection (OR 0.85, [95%CI 0.72, 1.01]).

P2/N95 respirators & surgical masks to prevent SARS-CoV-2 infection: Effectiveness & adverse...

The existing epidemiological evidence does not enable definitive assessment of the effectiveness of respirators compared to surgical masks in preventing infection. Healthcare workers wearing respir...

pubmed.ncbi.nlm.nih.gov

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Prof Peter Collignon

@CollignonPeter

1 year

There has been minimal transmission of Covid outdoors. So stopping people going outside was never a good idea. Nor was fining people for not wearing masks outdoors.

Covid rule that was an ‘atrocious mistake’

A leading Australian doctor has said that restrictions on outdoor activity at the height of the Covid pandemic were a massive mistake that should never be repeated.

www.news.com.au

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Prof Peter Collignon

@CollignonPeter

1 year

Multi bedded rooms increase infection risks for patients Patients who spent more than 50% of their hospital stay in a multi-bedded room had nearly twice the rate of acquiring COVID-19 in hospital (IRR 1.86, 95% CI 1.17–2.94).

Patient and ward related risk factors in a multi-ward nosocomial outbreak of COVID-19: Outbreak...

Background Risk factors for nosocomial COVID-19 outbreaks continue to evolve. The aim of this study was to investigate a multi-ward nosocomial outbreak of COVID-19 between 1st September and 15th...

aricjournal.biomedcentral.com

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Prof Peter Collignon

@CollignonPeter

4 years

Although Finland closed schools for most children and Sweden did not, and despite Sweden having been more affected by the outbreak overall, infection levels in children in both countries were very similar.

School closures do not slow the spread of Covid-19, according to Finnish-Swedish official study

Data Source for the above chart UK teachers have been spooked by the confusing messages of government and media. Campaigns by teachers' unions to only open when it is 'safe' have further reinforced...

inproportion2.talkigy.com

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Prof Peter Collignon

@CollignonPeter

2 years

Health authorities in Denmark said they were considering "winding down" the country's coronavirus vax program in the spring and see no reason now to administer a booster dose to children or a fourth shot to anymore residents at risk of severe COVID-19.

Denmark officials see no reason to give more COVID-19 vaccines

Health authorities in Denmark said Friday that they were considering 'winding down' the country's coronavirus vaccination program in the spring and see no reason now to administer a booster dose to...

www.ctvnews.ca

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Prof Peter Collignon

@CollignonPeter

2 years

For anyone still doubting the value of vaccination to prevent ICU admissions and/or death, these figures from NSW (pop 8m) speak for themselves. Only 10% of NSW’s adults are not vaccinated but the unvaccinated represent the vast majority of poor outcomes.

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Prof Peter Collignon

@CollignonPeter

2 years

In Australia also, lots of anti AZ, only have Pfizer “experts”. This meant we didn’t have 90% vaccination in those over 60ys by July 2021, when we should have, because we had enough AZ here. And this lead to 100’s of preventable deaths. Any remorse??

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Prof Peter Collignon

@CollignonPeter

3 months

"Real-world effectiveness of child mask mandates against SARS-CoV-2 transmission or infection has not been demonstrated with high-quality evidence. The current body of scientific data does not support masking children for protection against COVID-19."

Child mask mandates for COVID-19: a systematic review

Background Mask mandates for children during the COVID-19 pandemic varied in different locations. A risk-benefit analysis of this intervention has not yet been performed. In this study, we performed...

adc.bmj.com

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Prof Peter Collignon

@CollignonPeter

2 years

We need to get out of zero covid mentality and not furlough so many healthcare workers. Change definitions for HCWs who need to be furloughed, so to not be as broad and for not as long off work. Otherwise we won't have enought HCWs allowed to go to work.

Norman Swan

@normanswan

2 years

Got this from a clinician at a major Sydney hospital. “Hospital swamped. More than 100 staff furloughed. 30 covid positive & 50 amber. It will be increasingly hard to do anything else. It’s difficult to describe how furious we are with perrotet. He will destroy the health system”

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Prof Peter Collignon

@CollignonPeter

4 years

Thank you to all my new followers. By way of background, I have been employed at Canberra Hospital (our main public hospital) for the last 3 decades as an Infectious Diseases physician and in the clinical lab as a Microbiologist. My other area is Infection prevention and control.

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Prof Peter Collignon

@CollignonPeter

4 years

Good news still in Australia’s national epidemic curve (blue bars). It continues to fall after its peak on March 25. What we put in place then (and before that) seems to be working.

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Prof Peter Collignon

@CollignonPeter

2 years

Face Covering Masks mandates in schools were not associated with lower SARS-CoV-2 incidence or transmission, suggesting that this intervention was not effective. Instead, age-dependency was the most important factor for transmission risk for children

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Prof Peter Collignon

@CollignonPeter

3 years

We need to be very careful in accepting these dire predictions. Just look at what some of these people predicted over the last year or more about Covid spread and deaths in Australia. Way out with often with estimates and overestimated deaths.

OzSage modelling suggests higher level of deaths in NSW at 80% than 70% vaccination rate

Figures suggest two-step reopening would result in second, larger peak of hospitalisations and deaths, but findings not supported by other studies

www.theguardian.com

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Prof Peter Collignon

@CollignonPeter

3 years

Isn’t this both unlikely and unrealistic. Victoria to be locked down for close to 60% of 2022! - Even with 80% of their population vaccinated. It’s time to get more realistic, especially as so many commentators and their predictions and models have been so wrong in the past.

Charis Chang

@CharisChang2

3 years

New modelling shows lockdowns still needed for 58 per cent of the year even once 80 per cent of adults are vaccinated, to keep deaths down to 1000 a year (in a jurisdiction with a similar population to Victoria) and infections to 320 a day:

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Prof Peter Collignon

@CollignonPeter

4 years

Marylouise McLaws, a professor of epidemiology, who has examined behaviour at pubs and restaurants, argues indoor venues that play music and force patrons to talk louder – which projects particle spread – pose one of the greatest risks for virus spread.

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Prof Peter Collignon

@CollignonPeter

3 years

Children need playgrounds now, more than ever. We can reduce COVID risk and keep them open via @ConversationEDU

Children need playgrounds now, more than ever. We can reduce COVID risk and keep them open

There is some risk of COVID transmission in playgrounds, but the benefits of outdoor play, especially now, may outweigh the risks.

theconversation.com

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Prof Peter Collignon

@CollignonPeter

9 months

Mary Lou was a colleague, and friend, for over 30 years. We worked together on many issues, especially involving infection control and antibiotic resistance. We would often speak on the same media programs on Covid as well. She will be greatly missed

Mary-Louise McLaws, renowned epidemiologist who helped guide Australia through the pandemic, dies...

Mary-Louise McLaws, who was an epidemiologist at UNSW Sydney for more than 35 years and shared crucial information during the pandemic, has died after a long illness, her family has announced.

www.abc.net.au

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Prof Peter Collignon

@CollignonPeter

3 years

We need to put the risk of death from AZ vaccine into better perspective compared to benefits of the vaccine. If you are over >70 yrs and get infected with Covid, you have a higher that 1 in a 100 chance of dying compared to 1 in 2 million chance of dying after AZ vaccine.

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Prof Peter Collignon

@CollignonPeter

4 years

If look at NZ epidemic curve and compare to Australia's, I am not convinced NZ is doing better than us in Australia, despite their total lock down for weeks. We seem to have achieved the same result but with measures not as stringent. At 20 new cases pet day, NZ higher than here

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Prof Peter Collignon

@CollignonPeter

5 months

This was a review done in Australia on N95 respirators vs surgical masks to protect healthcare workers. Basically no extra benefits in preventing infections found, but there were more adverse events with respirators

P2/N95 respirators & surgical masks to prevent SARS-CoV-2 infection: Effectiveness & adverse effects

Millions of people have acquired and died from SARS-CoV-2 infection during the COVID-19 pandemic. Healthcare workers (HCWs) are required to wear personal protective equipment (PPE), including...

www.idhjournal.com.au

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Prof Peter Collignon

@CollignonPeter

2 years

Restrictions on outdoor activities were always way overdone. The risk of transmission outdoors was relatively so low, we should have been getting people to spend their time outdoors rather than locked-down and confined indoors for most of their time.

Infectious Disease Ethics

@ID_ethics

2 years

Outdoor public health interventions, Melbourne, 2020

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Prof Peter Collignon

@CollignonPeter

4 years

My interpretation of this modelling is that closing schools will be the least effective intervention to prevent deaths from coronavirus compared to other options. But will have major social and economic costs and interfere with best delivery of many essential services eg health

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Prof Peter Collignon

@CollignonPeter

4 years

A colleague did a population adjusted epi curve for Australia and NZ of new cases per day. Very similar. Makes me think the total lock down in NZ has not made a lot of difference case compared to Australia taking a less drastic approach (but we still closed all bars, clubs etc)

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Prof Peter Collignon

@CollignonPeter

2 years

Zero Covid zealots reach yet another milestone in China. China City Orders All Indoor Pets of COVID Patients to Be Killed

Chinese city orders all indoor pets belonging to COVID-19 patients in one neighborhood to be killed

The Anci district of Langfang city ordered the "complete culling of indoor animals," state media reported.

www.businessinsider.com

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Prof Peter Collignon

@CollignonPeter

2 years

Happy to be a co-signature on this opinion piece and letter. Australia COVID: For the sake of the children, reopen Australia’s schools

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Prof Peter Collignon

@CollignonPeter

3 months

This is after just one shift! And why N95 mask mandates don’t work. “In this cohort study of ED HCWs practicing N95 reuse, fit failure occurred in 38.7% of masks after 1 shift. Trifold N95s had higher incidence of fit failure compared with dome N95s.”

Fit Test Failure During N95 Respirator Reuse and Extended Use

This cohort study measures the incidence of qualitative fit test failure of dome, duckbill, and trifold N95 respirators reused by emergency department health care workers during a single shift and...

jamanetwork.com

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Prof Peter Collignon

@CollignonPeter

2 years

for children ages 6 to 11, the WHO does not routinely recommend masks, because of the “potential impact of wearing a mask on learning and psychosocial development.”

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Prof Peter Collignon

@CollignonPeter

1 month

Pfizer should be held accountable for suppressing data from this study. They must have known by July 2022 that their very expensive drug, at $1000 per course, was ineffective. But suppressed the data release. They made extra billions$ from sales as a result over the last 2 years…

Nick Mark MD

@nickmmark

1 month

Unsurprisingly the EPIC-SR trial of paxlovid failed to show significant benefit in low risk people with COVID. Enrollment stopped in July 2022. There was no pre-print. My question: Why did it take *years* to publish this? Dragging their feet on publishing made Pfizer billions.

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Prof Peter Collignon

@CollignonPeter

4 years

Overall summary of what has happened in Australia so far. Epidemic curve better than flattened, started falling by March 27. High levels of testing likely a big factor as well as multiple physical interventions, quarantine and good case follow ups by public health officials.

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Prof Peter Collignon

@CollignonPeter

3 years

We need to be very careful about very pessimistic modelling and predictions. They have been way out in the past. Too pessimistic now as well. As more people get vaccinated we will see both decreases in case fatality rates and in spread.

COVID vaccines begin to reduce hospitalisations

The protection offered by immunisation could keep the state’s intensive care cases well below numbers predicted by the Burnet Institute last month.

www.smh.com.au

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Prof Peter Collignon

@CollignonPeter

4 years

A graphic presentation from a school experiment that shows why washing your hands makes a difference.

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Prof Peter Collignon

@CollignonPeter

1 year

I'm not sure about gyms, but restrictions on outdoor activities was a major mistake. There was, and is very little transmission outdoors. It's hard to even find many convincing case reports. We should never in the future stop people from being outdoors.

Anthony LaMesa

@ajlamesa

1 year

Lockdowns restricting access to parks, pools, and gyms were a major mistake.

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Prof Peter Collignon

@CollignonPeter

1 year

This long-term Harvard study findings are important. Socialising and relationships are important for better long-term health. It also means excess covid restrictions and long lock-downs will have long-term health consequences as well.

Sahil Bloom

@SahilBloom

1 year

Finding: Loneliness kills. Humans are social creatures. We thrive through connection to those around us. Study participants who felt isolated were observably less happy and experienced notably earlier declines in health than those who felt connected.

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Prof Peter Collignon

@CollignonPeter

3 years

Nearly one in 10 Victorians 'seriously considered suicide' during COVID lockdown,

Nearly one in 10 Victorians 'seriously considered suicide' during COVID lockdown, report finds

A new survey reveals Victorians experienced "concerningly high levels" of mental distress during the height of last year's coronavirus restrictions.

www.abc.net.au

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Prof Peter Collignon

@CollignonPeter

3 years

Sweden saw lower 2020 death spike than much of Europe - data

Sweden, which has shunned the strict lockdowns that have choked much of the global economy, emerged from 2020 with a smaller increase in its overall mortality rate than most European countries, an...

www.reuters.com

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Prof Peter Collignon

@CollignonPeter

4 months

What worries me about this, is for a new virus from animals to be a major threat to cause a pandemic in people, it needs to readily grow in people and their cells. So whenever you grow these viruses in human cell lines (or monkey-cell lines), or infect “humanised” mice, you…

Richard H. Ebright

@R_H_Ebright

4 months

"Chinese scientists have been experimenting with a mutant coronavirus strain that is 100% lethal in mice—despite concerns such research could spark another pandemic."

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Prof Peter Collignon

@CollignonPeter

2 years

Its a bit unjust that the country that followed its pre-pandemic plan was the country accused of conducting an experiment on its population. Perhaps Sweden instead should be considered the control group, while the rest of the world underwent an experiment.

Did Sweden’s controversial COVID strategy pay off? In many ways it did – but it let the elderly down

Although Sweden was hit hard by the first wave, its total excess deaths during the first two years of the pandemic was among the lowest in Europe.

theconversation.com

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Prof Peter Collignon

@CollignonPeter

3 years

And NSW achieved this without lockdowns of Sydney or State as many were advocating over Christmas period; despite over 200 cases being found in December. Good result was dependent on good testing, very good combat tracing, cooperative public with restrictions, quarantine etc

NSW Health

@NSWHealth

3 years

NSW recorded no new locally acquired cases of #COVID19 in the 24 hours to 8pm last night, the 42nd consecutive day without a locally acquired case. Five new cases were acquired overseas, bringing the total number of cases in NSW since the beginning of the pandemic to 4,988.

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Prof Peter Collignon

@CollignonPeter

2 years

Dire predictions for school age children by Ozsage and others, wrong yet again.

Predicted COVID chaos in schools a false alarm

Low case numbers see twice-weekly rapid antigen testing end, along with mask mandates for students and teachers.

www.smh.com.au

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Prof Peter Collignon

@CollignonPeter

3 years

I don’t understand why a nebuliser in a high risk returned traveller was being used in a quarantine hotel. Nebulisers produce aerosols. If so unwell that they needed one, they should have been moved to a health facility. Was there not an early medical assessment of guests?

Pieter Peach (@[email protected])

@DrPieterPeach

3 years

“We think the exposures are [linked to] this nebuliser whereby ... virus was carried out into the corridor & expose the authorised officer, the food service worker & also the other resident. That makes sense in terms of the geography &it makes sense in terms of the exposure time”

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@CollignonPeter

3 years

Norway’s population is just over 5 million and is currently about 700 cases per day, but cases are falling. NSW population is about 8m and about 1000 cases per day. Vic similar Norwegians back to life as normal as it lifts COVID-19 restrictions

Norway lifts COVID-19 restrictions after 561 days

The decision to no longer require social distancing will allow culture and sports venues to utilise their full capacity, while restaurants can fill up and nightclubs reopen.

www.abc.net.au

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@CollignonPeter

4 years

Infections seem uncommon in children under age of 15yrs. It’s why we should reopen schools for these in term 2 - and while local transmission of covid in Australia is low. Who we should keep away from schools are teachers and others >50yrs. Also parents need 2 meter distancing

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@CollignonPeter

5 years

A 70% drop in antibiotic use in food animals in The Netherlands since 2007, but with no drop in food animal production. And associated with a drop in antimicrobial resistance levels.

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Prof Peter Collignon

@CollignonPeter

4 years

NSW (pop 8m) in Australia did stop a second wave from developing to any size by aggressive testing, contact tracing plus maintaining restrictions on numbers in bars, restaurants, churches etc and other restrictions. But not with lockdowns. I will send an epidemic curve

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Prof Peter Collignon

@CollignonPeter

2 years

NSW in 2020 and 2021, was constantly criticised for not locking down harder and earlier, unlike Victoria that adopted early on the NZ elimination policy. But NSW did repeatedly control spread. The less harsh restrictions in NSW still resulted in less deaths per capita than VIC

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Prof Peter Collignon

@CollignonPeter

10 months

Latest Australian excess deaths data from ABS. Interesting to compare our 2 largest states, NSW(8.2m) and VIC(6.8m). Despite Vic’s harsher restriction and zero-covid approach compared to NSW, it did not do better in preventing excess deaths. Looks to have done consistently worse

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Prof Peter Collignon

@CollignonPeter

3 years

Around 11 per cent of older Australians take daily aspirin to help prevent stroke and heart attack, but statistically, aspirin is two hundred times more dangerous than AstraZeneca – resulting in around one death per 10,000 people.

Getting a COVID jab is safer than taking aspirin

Risk of rare side effects of COVID-19 vaccines are being greatly exaggerated: they are far safer than many regular medicines says University of Melbourne expert

pursuit.unimelb.edu.au

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Prof Peter Collignon

@CollignonPeter

9 months

prolonged school closures led to a substantial deterioration in youth health-related quality of life, precipitating early signs of mental health problems. The effects were most severe among boys, younger adolescents, and families with limited living space

The youth mental health crisis: Quasi-experimental evidence on the role of school closures

School closures cause the youth mental health problems during the COVID-19 pandemic.

www.science.org

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Prof Peter Collignon

@CollignonPeter

2 years

Hard to believe what some zero-covid advocates Drs can make such outrageous and threatening comments. I hope the AMA is still not strongly supporting Dr Berger anymore. The VIC AMA called for a Royal commission into our regulator because it took issue with some of his comments

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@CollignonPeter

2 years

The majority of children had asymptomatic or mild disease. Hospitalisation was uncommon and occurred most frequently in young infants and adolescents with comorbidities. More children were hospitalised for social reasons than for medical care.

COVID-19 in children in NSW, Australia, during the 2021 Delta outbreak: Severity and Disease...

Objective(s) To describe the severity and clinical spectrum of SARS-CoV-2 infection in Australian children during the 2021 Delta outbreak. Design, Setting & Participants A prospective cohort study of...

www.medrxiv.org

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Prof Peter Collignon

@CollignonPeter

4 years

All the data from Australia and internationally, suggests it is uncommon for children <15 yrs to get or spread Covid. So why are so many not wanting them to go to school here? Especially as spread in Australia is now so low and we have extensive testing.

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Prof Peter Collignon

@CollignonPeter

4 years

And SA has done this in conjunction with the highest per capita testing in Australia but with much less restrictive measures than Vic or NZ. No lockup’s in people’s houses. People allowed to sit in a park. Go for a drive.

Isabel Dayman

@IsabelDayman

4 years

#BREAKING : South Australia has recorded five days straight of zero new cases of #coronavirus . 95% of all recorded cases have recovered. @abcadelaide

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Prof Peter Collignon

@CollignonPeter

1 year

A warning in 2015 we ignored. Can anyone give examples of any “gain of function” research that has given us any tangible benefits? I can’t see how it has helped with any better vaccines or drugs for flu, coronavirus etc All risk and pain with no gain

Engineered bat virus stirs debate over risky research

Nature - Lab-made coronavirus related to SARS can infect human cells.

www.nature.com

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Prof Peter Collignon

@CollignonPeter

4 years

Victoria seems to have ongoing issue with finalising contact tracing and identifying in timely fashion (within 48hrs) close contacts of those infected or where people acquired their infection from. This relatively poor contact tracing will make Steps out of lockdown difficult.

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Prof Peter Collignon

@CollignonPeter

3 years

No influenza in Australia for over a year now. Australia has had its international borders closed since April 2020. After this we have seen almost no influenza. Implies that most of influenza we previously saw every year in thru travellers and then spread thru the community.

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Prof Peter Collignon

@CollignonPeter

3 years

Two temporary COVID-19 wards closed in Sydney due to waning demand last week, a good sign of where things might be heading. Hospitalisations in NSW have now declined by one third since the peak, same with ICU admissions.

Good reasons to believe COVID cases may not skyrocket as NSW opens up

The population level protection from vaccine coverage will be at its peak right now.

www.smh.com.au

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Prof Peter Collignon

@CollignonPeter

3 years

Melbourne and Sydney seem to be similar for their likely current prevalence of Covid. So a 14 day quarantine seems inappropriate. Why not just the same stay at home orders as everyone else?

casey briggs

@CaseyBriggs

3 years

Daniel Andrews has announced fully vaccinated Victorians in Sydney will be allowed to return home from the 30th, if they also return a negative test result within three days of travelling and home quarantine for 14 days

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Prof Peter Collignon

@CollignonPeter

2 months

The term "long COVID" should be scrapped, according to Queensland's Chief Health Officer, because it creates unnecessary fear — and is "probably harmful".

Queensland's Chief Health Officer says it's time to stop using the term 'long COVID'

The state's chief health officer says the description wrongly implied long-term post-COVID viral symptoms were "somehow unique and exceptional" to other viral infections.

www.abc.net.au

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Prof Peter Collignon

@CollignonPeter

3 years

My views on short lockdowns and why they have not made much extra difference here, when we have low levels of community transmission, good contact tracing, lots of testing , community cooperation etc.

Sunrise

@sunriseon7

3 years

Infectious diseases expert @CollignonPeter has blasted premiers for plunging their states into lockdown each time a new case of COVID-19 is identified. He said lockdowns “don’t add anything” if you have “good contact tracing, good testing and cooperation with the community.”

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Prof Peter Collignon

@CollignonPeter

1 year

In 2021, in Victoria, you were only allowed to be outdoors for 1 hr before it was increased to 2 hrs. But any limits on being outdoors were never sensible or evidence based. The risk of transmission outdoors was always very, very low.

Little-known lockdown rule sees some Melburnians granted extra hour outdoors

After almost five weeks under Stage 4 lockdown restrictions, the Department of Health and Human Services has issued a clarification.

7news.com.au

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Prof Peter Collignon

@CollignonPeter

1 year

Covid zero approaches did not necessarily prevent more Covid related deaths compared to States that took less restrictive approaches. NSW is still criticised for not locking down much more and earlier. But it has less deaths per capita than Victoria with its early zero covid…

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Prof Peter Collignon

@CollignonPeter

9 months

Latest Australian excess deaths data from ABS. Interesting to compare our 2 largest states, NSW(8.2m) and VIC(6.8m). Despite Vic’s harsher restriction and zero-covid approach compared to NSW, it did not do better in preventing excess deaths. Looks to have done consistently worse

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Prof Peter Collignon

@CollignonPeter

2 years

Deaths nationally have peaked from the omicron wave, with Australia recording almost 13,000 fewer deaths across the two years of the pandemic than would typically have occurred.

Omicron deaths peak as fatalities fall below pre-pandemic levels

Australia is on track to have almost 13,000 fewer excess deaths in the two years of COVID-19 than would have been expected had the pandemic not occurred.

www.afr.com

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Prof Peter Collignon

@CollignonPeter

1 year

2022 was the first year when covid circulated widely in Australia. Likely more than 80% of people have now been infected. But we had more than 95% of adults vaccinated. Our fatality rate in 2022 was much less than 0.1% on a pop basis, showing the how well vaccines protected us.

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Prof Peter Collignon

@CollignonPeter

1 year

Depending on how you analyse excess deaths, Sweden appears to have done better than both Australia and NZ.

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Prof Peter Collignon

@CollignonPeter

5 years

Why microbes often beat us. They understand maths, physics and military tactics.

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Prof Peter Collignon

@CollignonPeter

3 years

Still almost no influenza A or B in NSW and Australia for last 2 yrs. But lots of other respiratory viruses eg RSV and Rhinovirus. Given limited travel into Australia and strict quarantine here, implies in the past for winter outbreaks, that influenza is imported each year

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Prof Peter Collignon

@CollignonPeter

4 years

Still good news in NSW epidemic curve. Better than flattening, its still going down from a March 25 peak. The black bars are the important subset to watch. Locally acquired cases. They are going down as well.

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Prof Peter Collignon

@CollignonPeter

2 months

Latest from NY Times. School closures did little to stop the spread of Covid but caused a lot of long term harm to children.

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Prof Peter Collignon

@CollignonPeter

2 years

I feel honoured to be included in the same group as Nick, Fiona and Greg. All very good Infectious Diseases physicians or paediatricians, each with decades giving clinical care to seriously ill people and all very good public health advocates, - and well before covid appeared.

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Prof Peter Collignon

@CollignonPeter

3 years

The highly contagious Delta strain of COVID-19 infected everyone who attended a Sydney birthday party except for the six people who were vaccinated,

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Prof Peter Collignon

@CollignonPeter

4 years

Australia's epidemic curve for new cases (blue bars). Curve better than flattened, it turned around about March 27. Now less than 50 new cases per day. But winter will be our next big test.

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Prof Peter Collignon

@CollignonPeter

2 years

Schools and masks. "Replicating the CDC study shows similar results; however, incorporating a larger sample and longer period showed no significant relationship between mask mandates and case rates"

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Prof Peter Collignon

@CollignonPeter

4 years

A nine-year-old boy who contracted Covid-19 in Eastern France did not pass the virus on despite coming into contact with more than 170 people, according to research that suggests children may not be major spreaders of the virus.

Boy with Covid-19 did not transmit disease to more than 170 contacts

Case of symptomatic nine-year-old suggests children may be less likely to pass on virus

www.theguardian.com

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Prof Peter Collignon

@CollignonPeter

2 years

Outside air has in it factors that kill viruses and bacteria. So not just dilution effect. That’s why adequate ventilation that brings in outside air is so important. Evidence for these factors in outside air is in this paper on this link.

An Old Defence Against New Infections: The Open-Air Factor and COVID-19

Outdoors, the risks of transmission of COVID-19 and many other respiratory infections are low. Several environmental factors are known to reduce the viability of viruses and other infectious pat...

www.cureus.com

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Prof Peter Collignon

@CollignonPeter

4 years

Most cases of COVID-19 do not infect others. 80% of the onward transmission of the pandemic may arise from less than 20% of cases and may be concentrated in high risk settings.

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Prof Peter Collignon

@CollignonPeter

7 months

Children were the least at risk from Covid. And because of lower levels of ACE2 receptors in respiratory tract, were less of an infection risk compared to their parents BUT "Children were at the back of the queue when the government made its biggest decisions about lockdown and…

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Prof Peter Collignon

@CollignonPeter

3 years

Rather than halving international arrivals, a simple and much less damaging approach to reducing risk would be to require all international arrivals to have verification of receiving two doses of any vaccine approved in Australia.

There’s a better way to keep Australia safe than the illogical cut in overseas arrivals

The risk profile of vaccinated people is different and governments should be taking that into account.

www.smh.com.au

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Prof Peter Collignon

@CollignonPeter

4 years

New Zealand epidemic curve. The Good news is their new case numbers are falling. But I think NSW and Australian epidemic curves are looking better and Australia have achieved this with out the full lock down that NZ has done.

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Prof Peter Collignon

@CollignonPeter

4 years

I am doubtful we can eliminate this virus. Many mild infections means it will hard to find them all. I am happy to be proved wrong however. But even if NZ or Australia eliminates the virus, it’s everywhere else in the world in big numbers, so hard to see how it will stay out.

Stephen Duckett

@stephenjduckett

4 years

Our thoughts: Australia should join New Zealand and shoot for eliminating Coronavirus via @GrattanInst

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Prof Peter Collignon

@CollignonPeter

3 months

pandemic main lesson is the importance of not panicking during a crisis. Policies should have their basis in scientific evidence and a focus on the long run. Autocratic countries such as China should not serve as a role model in limiting citizens' rights.

The Covid‐19 lesson from Sweden: Don't lock down

Covid-19 triggered a wave of lockdowns across the world, contributing to a severe downturn in economic activity. Governments responded by introducing expansionary fiscal and monetary measures. We...

onlinelibrary.wiley.com

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Prof Peter Collignon

@CollignonPeter

4 years

What we do now to slow spread we need to continue til after our winter So don't overdo it too early. Our epidemic curve is falling and wIth low community transmision rates. My views on why its now overdone in NSW and Vic. We are not NY and unlikely to be.

We need to live restricted lives for at least six months – police enforced lockdowns are unnecess...

There is no evidence to support the over the top laws put in place in NSW and Victoria in response to the coronavirus

www.theguardian.com

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Prof Peter Collignon

@CollignonPeter

6 months

While HEPA filters can significantly reduce the viral load in room air, this does not lead to reduced COVID-19 prevalence in the selected kindergartens in Germany.

Effect of portable HEPA filters on COVID-19 period prevalence: an observational quasi-interventio...

Objectives The aim of the study was to evaluate the effect of high-efficiency particulate air (HEPA) filters on COVID-19 period prevalence in kindergartens. Design The observational study follows an...

bmjopen.bmj.com

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Prof Peter Collignon

@CollignonPeter

1 year

I agree all deaths are sad tragic. But what can we realistically do more at this stage. Yes wear a mask yourself to decrease your risk and be outside more. But close all bars, pubs and gyms?

Al Prior

@AlrantAl

1 year

@CollignonPeter All part of the Reaping, hey Peter, the dry tinder? Why is it when an elderly person dies in a road accident its a sad tragedy but when they die from covid its just expected?

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Prof Peter Collignon

@CollignonPeter

1 month

Paxlovid, no benefit in this Pfizer study. Study finished in July 2022, but this seems to be first results made public. If there was a benefit I bet there would have been a press release already in 2022. Why no earlier preliminary release of findings?

Nirmatrelvir for Vaccinated or Unvaccinated Adult Outpatients with Covid-19 | NEJM

Nirmatrelvir in combination with ritonavir is an antiviral treatment for mild-to-moderate coronavirus disease 2019 (Covid-19). The efficacy of this treatment in patients who are at standard risk fo...

www.nejm.org

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Prof Peter Collignon

@CollignonPeter

4 years

The five-kilometre rule. More than 90 per cent of cases are now linked to outbreaks, mostly in permitted workplaces where this rule does not apply, or in workers' homes.

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