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Nancy Delagrave Profile
Nancy Delagrave

@RougeMatisse

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Société canadienne de la covid, coordonnatrice scientifique de Covid-Stop, physicienne, mathématicienne et citoyenne engagée.

Montréal
Joined March 2012
Don't wanna be here? Send us removal request.
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@RougeMatisse
Nancy Delagrave
2 months
Notre article dans La Presse: Nous avons besoin d’une organisation nationale à but non lucratif basée sur les modèles de la Société canadienne du cancer et de la Fondation des maladies du cœur et de l’AVC pour ce qui est de la COVID et ses conséquences.
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Nancy Delagrave
2 years
This figure about the long-term effects of Covid from a meta-analysis published in Nature is striking. What crazy world of pain have our public health agencies signed us up for?
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Nancy Delagrave
2 years
There is something really wrong going on at the moment. People who have not kept up with the literature - let's face it 98 % out there - think that they are protected and will face no adverse consequences if they are infected a 2nd time. Sequelae are more common the 2nd time.👇
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Nancy Delagrave
1 year
"The removal of masks in healthcare settings is mind-boggling. It’s kind of in the same vein as if people were like, “Yeah, well, HIV is not new anymore, so people handling blood or contaminated material don’t need to wear gloves in a healthcare setting.”
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Nancy Delagrave
1 year
4th Covid "“Every time I catch it, it adds new layers to my disabilities,” she says. “COVID is slowly killing me.” Her haematologist believes the past COVID infections have further damaged her immune system. She is looking at a possible lupus diagnosis."
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Nancy Delagrave
9 months
I am in an upscale spa where prices are completely outrageous. My cousin had booked a massage for me last week. When I asked the manager if my massotherapist could wear a mask (that I would give her), she spoke to me about individual rights. This is not wellness. @SpaScandinave
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Nancy Delagrave
8 months
1847 PPM of CO2 during a long Covid canadian symposium. 1 out 10 attendees are masked even though stylish N95s are distributed freely. A few long Covid patients in wheelchairs. With N95s of course. This is not solidarity.
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Nancy Delagrave
3 years
Let's bust some myths 🧵 1. Herd immunity is coming soon This is Iran. There are 3 shades of green on this map. Starting at medium green, each person living in this province has been infected on average more than once.
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@Mahan_Ghafari
Mahan Ghafari | ماهان غفاری
3 years
end/ finally, and this is the key point, at the same time that Manaus was experiencing >75% attack rates, some provinces in Iran had equally high ARs. Since then, some provs reached >100% AR but natural immunity DID NOT stop the spread --> Everyone should get vaccinated ASAP!
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Nancy Delagrave
1 year
"If you have sentinel intelligence, it probably infuriates you how the vast majority of people can’t or won’t connect all the threads. It’s why you’re often confused with your arch-enemy, the conspiracy theorist." 1/2 Great text by @JessicaLexicus
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Nancy Delagrave
1 year
"Alarmingly, two studies published by the Mayo Clinic and the Medical University Innsbruck corroborate the findings in the Nature articles, recording signs of dream-enactment sleep disorder among one-third of patients after being infected with COV1D-19."
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Nancy Delagrave
1 year
"Healthcare in Britain has collapsed, and it’s safe to say healthcare in major cities across the U.S. and Canada are next. We’re heading in that direction. There’s no other way to describe the reports coming out of UK hospitals."
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Nancy Delagrave
3 months
"“Every time you get infected [with COVID], it does harm to the body in some way,” says Avindra Nath, a neurologist at the National Institutes of Health who has led research on long COVID and other postviral conditions."
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Nancy Delagrave
2 years
What Nigeria does to keep monkeypox cases low. Test, contact trace and isolate. Aggressively. Can we?
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Nancy Delagrave
2 years
🔴Bank of England Worried about the sharp of the 16-64 population who are outside the workforce and do not want a job because of long-term sickness, especially women. Main cause are estimated to be long Covid and the rise in NHS waiting lists.
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Nancy Delagrave
2 years
Short🧵 1. Monkeypox: These two things cannot be true at once. ✔️Airborne transmission was the most common mode based on CDC references. ❌Now it is NOT a mode of transmission at all. H/T @tastycaketaster 🙏🏼
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Nancy Delagrave
2 years
Monkeypox: We have precise data on prairie dogs to human airborne transmission ✅For 5 out of 7 patients, were within < 3 feet ✅1 patient at > 3 feet ✅1 was never in the same room as a prairie dog but within 48 hours of its removal after death
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Nancy Delagrave
2 years
In Japan, masked people are asked to stay quiet in the metro or train to prevent superspreading events. This American flight attendant sang as loud as he could to ask passengers to drop their masks. Japanese people are wiser and healthier. Disinformation in the US has won.
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@marynmck
Maryn McKenna
2 years
Here's a flight attendant so happy for the discarding-masks order he's singing to encourage people to throw them away. Just before take-off. Imaging being the parent of a kid under 5, or an immunocompromised person, stuck on this flight.
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Nancy Delagrave
1 year
I have been wearing my KN95 too while cycling because of allergies and it's miraculous. When I do not wear it, I have to blow my nose every minute; while wearing it, I stay dry. Respirators have many advantages and it's about time we speak about them beyond respiratory viruses.
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Nancy Delagrave
1 year
David Fisman has left Twitter. I am saddened but I understand his decision.
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Nancy Delagrave
2 years
"Finally, there is the “dose-response” effect of multiple reinfections. By that I mean with additional episodes of Covid, for every outcome there was a stepwise increased risk, both relative (left panel) and absolute (right panel)."
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Nancy Delagrave
2 years
Benjamin Ryan does not understand that "airborne" simply means that you can inhale the virus and get infected. We know that's possible because HCWs, prisoners, and monkeys in labs have been infected that way. It does not mean that you need a Hazmat suit everywhere you go.
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Nancy Delagrave
2 years
🧵 1. "It is clear that the CDC deliberately concealed this vital information from the public for weeks, as part of the relentless propaganda campaign by the Biden administration and the corporate media to falsely claim that “the pandemic is over.”
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Nancy Delagrave
3 years
I suggest that we abandon the reigning popular models based on 1918 flu and accept that this is a novel coronavirus with all the uncertainty that it entails. Let's be humble and act on sound science based on this rapidly evolving coronavirus. We don't know how it ends yet.
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Nancy Delagrave
1 year
"Boys born to mothers who got COVID-19 while pregnant appear nearly twice as likely as other boys to be diagnosed with subtle delays in brain development." 👆🏼Conclusion of a study of more than 18,000 children born at eight hospitals in Massachusetts
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Nancy Delagrave
2 years
Monkeypox : "The most common cause of human-to-human transmission, as rare as it is considered, is respiratory droplets." From "Monkeypox: A Comprehensive Review of Transmission, Pathogenesis, and Manifestation" Jasndeep Kaler et al..
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Nancy Delagrave
6 months
Living with the virus: Throwing away decades of progress one infection at a time. Yes, that's babies dying. Such an inconvenient fact when the urgency of brunch has been agreed upon!
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Nancy Delagrave
1 year
Je n'en peux plus du Dr Karl Weiss et de ses faux dilemmes. Personne ne demande de fermer la société. On demande de traiter la Covid comme un virus qui se transmet par l'air et donc de traiter l'air en le filtrant et en imposant des normes de ventilation. 1/2
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Nancy Delagrave
2 years
This is major. The CDC, in its questionnaire for monkeypox, is deliberately NOT asking questions that would help capture information on airborne transmission. 🧵 Will they say afterwards: nothing leads us to conclude that there is airborne transmission?
@LazarusLong13
Lazarus Long
2 years
Imagine you are working at the CDC and see an explosion of monkeypox cases in America. You desperately want to get to the bottom of why the cases are increasing so rapidly. But you are on the outside looking in. The only way to get those details is to talk
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Nancy Delagrave
2 years
« Environ la moitié de l'humanité n'est pas prête à porter un masque pour sauver la personne à côté d'elle... quel espoir avons-nous de convaincre cette génération de sauver une planète habitable pour la suivante ? » - James Heilman Tellement!
@WikiDocJames
James Heilman, MD 🇺🇦
2 years
About half of humanity is not willing to wear a mask to save the person beside them... what hope do we have convincing this generation to save a habitable planet for the next?
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Nancy Delagrave
2 years
🧵Who helped the tobacco industry sell more cigarettes since the 1950's? @McKinsey , that's who. Who helped the FDA regulate cigarette? Also, @Mckinsey . This is the agency that @francoislegault & @fordnation hired. Along with many other states and countries. (And Pfizer too.)
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Nancy Delagrave
1 year
Short🧵 1. Arterial stiffening which worsens over 90 days has been observed in a small cohort of 32 persons (who had their pre-pandemic arterial stiffness measured) after a mild Cov1d infection. This surprised the researchers who expected an improvement
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Nancy Delagrave
1 year
1. ⁦ @JimRosenthal4 ⁩ and ⁦ @CorsIAQ ⁩, there is now a Corsi-Rosenthal cube at Québec National Assembly. Yes, it passed the security check and will now show how absurd it is to refuse them in classes. (Still)
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Nancy Delagrave
2 years
Good, but how frustrating is it when you (meaning I and many others including Asian and Occidental scientists) have been on team airborne since day one.
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Nancy Delagrave
1 year
"Where’s the COVID recovery plan? If we’re ending the emergency, then we should be moving into the recovery phase, and that should mean coming up with a long-term plan, and providing support and compensation." - @EpiEllie
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Nancy Delagrave
1 year
"The thing about cleaner indoor air is that it works on any variant… and it doesn’t take away anyone’s freedoms." - Christina Pagel, a professor with a math and physics background at University College London."
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Nancy Delagrave
1 year
"It’s not that we need to lock down forever, or mask everywhere forever, but we need to come up with a plan to protect people and allow them to have full participation in society, because right now, that’s not happening." I believe that this plan is called better ventilation.
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Nancy Delagrave
3 years
Let me repeat this : On average, it was estimated at the end of Jan 2021, the citizens of Sistan and Baluchistan had been infected on average 1.2 times in a year but the combined fourth and fifth wave were still the deadliest and each person had Covid 2.5 times overall on average
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Nancy Delagrave
2 years
Coronavirus in late pregnancy raises premature birth risk seven-fold and that is not what a family wishes for. My two-cents: our infection laissez-faire attitude has made the world more threatening to mothers and babies and we should care about that.
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Nancy Delagrave
2 years
‼️ 13 suspected cases of monkeypox in Montreal. We ditched masks last Saturday. What a great timing!
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@ReneSaintLouis
René Saint-Louis
2 years
Variole du singe, 13 cas suspects à Montréal, tous dans la communauté homosexuelle. Je vous en parle à 16H15 au 95,1 FM @le1518 @icimontreal @RadioCanadaInfo
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Nancy Delagrave
8 months
Exactly.
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Nancy Delagrave
3 years
The data on vaccination is a 1 billion person strong. We know that it is highly effective at⬇️the severity of the disease. We also know that immunity towards infection wanes in ~ 47 % after 4 months (Lancet). This is a problem that we are not sure how to fix on the long term.
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Nancy Delagrave
2 years
@catladyactivist has unfortunately experienced this.
@catladyactivist
Cat Herding Science Nerd 🔬
2 years
March 2020: Exercise intolerance, dysautonomia, recurring shingles, intermittent tinnitus. Lasted 18 months. January 2022: Tinnitus now severe, constant. Dysautonomia worse. Debilitating brain fog, PEM, neuropathy, tremors. Some improvement but still much worse than pre-Omicron.
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Nancy Delagrave
11 months
Ready to run errands while protecting my health in Montreal during the summer-of-fire-smog. I am donning a 3M Aura for the 1st time. The fit seems great to me.
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Nancy Delagrave
1 year
"A study published today suggests the prevalence of long COVID was 36% among George Washington University students, faculty, staff and other members of the campus community who had tested positive for COVID-19 between July 2021 and March 2022."
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Nancy Delagrave
8 months
“We are in denial about the consequencss of this pandemic.” - @pavlosbob #LongCovid Canadian Symposium
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Nancy Delagrave
2 years
"Improving it[ventilation] could cut down on school outbreaks and the interruptions they pose to families, as well as mitigate the risks of MIS-C and Long COVID in children—two long-term conditions that can result from a COVID-19 infection."
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Nancy Delagrave
2 years
Foremost respiratory viruses scientist Lidia Morawska speaking about how governments have ignored the scientists during the pandemic. A ventilation revolution is needed.
@nalticx
NALTIC Industrials, LLC
2 years
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Nancy Delagrave
2 years
Pourquoi refuser une solution qui ne peut qu'être bénéfique? 🔹Réduction des infections respiratoires 🔹Réduction de l'absentéisme 🔹Réduction des allergènes et contaminants 🔹Réduction de la charge virale et donc de la sévérité de la maladie
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Nancy Delagrave
1 year
No surprise here. I know many people who got infected during their flights because they took off their masks. I won't fly without at least a fit-tested N95. H/T @mitchlafon
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Nancy Delagrave
2 years
Comment allez-vous aujourd'hui? Moi, je suis tannée que le public soit mal informé des réinfections et des séquelles de la Covid. Ce n'est pas ma job d'informer, mais je le fais car les autorités officielles laissent un grand vide. Je peux me réveiller quand le groupe suivra?
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Nancy Delagrave
2 years
Je n’en peux plus. Les aérosols infectieux ne se comportent pas différemment qu’ils soient dans un cabinet de dentiste, un hôpital ou une classe. Mes cours de physique s’appliquaient à tout l’Univers et bien au delà des frontières du QC. En 🇩🇪🇺🇸🇫🇷🇪🇸🇨🇦, ils sont recommandés.
@CovidEcoles
Covid Ecoles Quebec
2 years
Purificateurs: Boileau is the new Arruda
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Nancy Delagrave
1 year
"And that’s just an invitation for disaster, because a lot of people think that something has fundamentally changed about the virus to make it safer now, and that’s just not how viruses work."
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Nancy Delagrave
2 years
@lisa_iannattone A child is in intensive care in the UK and the illness is generally more severe in children. Not mild.
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Nancy Delagrave
2 years
Suis-je la seule à trouver que les allergies saisonnières sont particulièrement intenses présentement ?
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Nancy Delagrave
2 years
@lisa_iannattone Travel has to be involved though. The virus did not create itself in multiple countries where it had been absent for decades. May 8th: UK May 18th: Portugal, Spain, US, Canada This is truly weird. I hope that we will know more soon.
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Nancy Delagrave
1 year
"To be clear, there’s a difference. Research in psychology has associated sentinel intelligence with higher levels of empathy, compassion, and overall intelligence." 2/2
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Nancy Delagrave
1 year
"COVID is going to be around for a while. Whether our response is an emergency one or long-term one, doesn’t super matter, but there needs to be a response. And, instead, what we’re seeing is that people are sick of COVID, are sick of doing COVID precautions."
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Nancy Delagrave
2 years
Air goes out. Air transports viruses. Air goes in. Air possibly infects. Therefore we need to clean the air. "The physics of respiratory particle generation, fate in the air, and inhalation" by Lidia Morawska
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Nancy Delagrave
2 years
Peer-reviewed study by @sri_srikrishna : "Tested DIY alternatives using lower-efficiency, single filters compare favorably to tested HEPA-purifiers in estimated CADR, (...) at five to ten times lower cost, enabling cheap, rapid aerosol removal indoors.
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Nancy Delagrave
1 year
On demande aussi une communication claire sur la transmission aérosole et l'efficacité des masques de type N95/KN95 ainsi que sur les séquelles immunitaires, cardiovasculaires et sur les organes importants du corps humain. Comme on l'a fait pour les effets du tabagisme. 2/2
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Nancy Delagrave
3 years
The reigning popular models still speak about herd immunity and Covid becoming more and more like a nice manageable flu for the people who have been infected or vaccinated.
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Nancy Delagrave
2 years
UV light inactivates poxviruses "In decay experiments, upper-room UVC fixtures used with mixing by a conventional ceiling fan produced decreases in airborne🦠concentrations that would require additional ventilation of more than 87 air changes per hour."
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Nancy Delagrave
1 year
According to this data from the state of Victoria, Australia, Covid hospital-acquired infections kill 100 times more than Covid in the community (not hospitalized). Why would Canada be any different? Masks need to stay in hospitals.
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Nancy Delagrave
2 years
A study specifically on the Corsi-Rosenthal cube by @CorsIAQ and others. The graph👇🏼shows the Corsi-Rosenthal cube (with four filters and a shroud) efficiency at removing airborne particles. It works better than 2 HEPA air cleaners at all speeds.
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Nancy Delagrave
1 year
"As someone who is very isolated with her family — everyone works and goes to school from home — Jill believes that the appointment led to her most recent infection." 💔 H/T @CovidEcoles
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Nancy Delagrave
1 year
"Over 80% of patients with dream-enactment sleep disorder go on to develop a Parkinson's-like disease within two decades." Awesome that we have decided to do nothing and hope for the best! /s
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Nancy Delagrave
1 year
"But when we think about other kinds of emergencies—for example, during Hurricane Katrina—there’s an emergency response that happens right away, and then that transitions to a recovery plan that, long term, provides support: gets people housed, compensates people who lost things"
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Nancy Delagrave
11 months
Tonight, I want to reflect on all the good citizens who are investing their time and money to inform us that Covid has long-term health consequences and we have been fed popular myths by ill-fated actors. Know that I appreciate you. Together, our voices will be heard.
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Nancy Delagrave
2 years
🧵 1. "People infected with the highly transmissible Alpha, Delta and Omicron variants of SARS-CoV-2 spew out higher amounts of virus than those infected with other variants, according to a new study." Study by @drkristenkc et al. @H /T @ariccio
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Nancy Delagrave
2 years
🧵 1. Je me demande si la firme McKinsey s'est avérée plus « contrôlable » que la Dre Joanne Liu ou mieux informée scientifiquement sur la gestion des pandémies que l'ancienne présidente de Médecins sans frontières qui a travaillé sur plusieurs épidémies.
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Nancy Delagrave
3 years
In dark green, the provinces with an overall population attack rate between 150% and 200% during the 5 waves which surged in Iran. Kurdistan : 155 % North Khorasan : 157 % Qazvin : 163 % So each person living in these provinces has caught it > 1,5 times in 21 months.
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Nancy Delagrave
1 year
"At the hospital appointment several nurses were not wearing their masks properly, and one kept pulling it down to talk with Jill, who had to remove hers to get her lungs checked."
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Nancy Delagrave
7 months
This is Thanksgiving weekend in Canada. 🙏🏼I want to be grateful to my parents for still masking despite never seeing other maskers in shops in their small town. 🙏🏼I want to be grateful for the friendships I have developed through my advocacy - that includes you tweeps.
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Nancy Delagrave
1 year
"It’s not like it’s always going to be getting milder, and if we take away all the precautions and we let COVID have as many hosts as it wants, it can become more severe again. And we’re getting rid of testing, we’re getting rid of tracking. I’m not very happy about it."
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Nancy Delagrave
2 years
Some airborne transmission events we know about: - Two health care workers were infected in Nigeria with no direct contact with infected patients. - Isolated prisoners in Nigeria were infected nonetheless
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Nancy Delagrave
1 year
Covid is airborne.
@hassinhadi
Hadi Hassin
1 year
Au Centre Eaton de Montréal, un employé réinstalle des distributeurs à la suite de la recommandation de la santé publique et du gouvernement du Québec. #rcmtl
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Nancy Delagrave
1 year
I will be on @CTVMontreal tonight at 18 h 00 with a demo on how to build Corsi-Rosenthal cubes with @MGrilloCTV and why they are such an efficient solution to clean the air conditioner of the SARS-CoV-2, RSV and influenza viruses. #KidsHealthMatter
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Nancy Delagrave
3 years
La fermeture des écoles a plus d’impact épidémiologique que le confinement strict.(Méta-analyse The Lancet sur 131 pays.)
@dgurdasani1
Dr. Deepti Gurdasani
3 years
Another study of >131 countries showed that among different interventions studied, one of the highest changes in R (R ratio) between introducing an intervention & lifting it was for school closures:
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Nancy Delagrave
1 year
"What does it mean for there to be a pandemic? In a pandemic situation, you don’t necessarily have a good sense of what the next month’s infections will look like. And anywhere, worldwide, at any time, you could have a surge. I think we’re really in that space still."
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Nancy Delagrave
2 years
@DavidJuncker It just shows that affordable solutions are a plenty. Organizations lack the will to educate and say that Covid is airborne and that fit of the mask is important. Denial is not a strategy.
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Nancy Delagrave
2 years
Mon oncle qui souffre de mésothéliome a attrapé la Covid à l'hôpital. Je ne peux pas vous dire comment je rage que nos 🏥 sont devenus un lieu de propagation pour les personnes les plus vulnérables. 2 ans 1/2 plus tard, toujours la nonchalance face à un 🦠 transmis par l'air! 🤬
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Nancy Delagrave
1 year
"Instead of recommending upgraded masks, air cleaners and UV, or working from home, immunologists that manage my condition recommend wearing a mask if you want and enjoying your life—as short as that may be."
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Nancy Delagrave
2 years
"It is a crazy paradox, isn't it? To think it took about 70 years for (...) for Toronto to take poop out of drinking water... and now we need to deal with air." - ⁦ @DFisman ⁩ L'air est le nouveau caca. 💩
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Nancy Delagrave
2 years
@MartinMichaud5 It's a meta-analysis where 55 articles were included, 20 of them already being meta-analyses, so their results are certainly validated by others. They come from them. It is published in the prestigious review Nature and it has not been retracted.
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Nancy Delagrave
1 year
"So, once masking was no longer mandated in public settings, many dropped requirements — this includes many of the specialists seeing immunocompromised people, including those Jill now sees due to Long COVID."
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Nancy Delagrave
1 year
"I am not sure if this is complacency, or giving up… Either way, education and change need to happen or far too many valuable lives will be lost and disabled unnecessarily,” says Jill." [Note: Yes, Jill with her 4th Covid]
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Nancy Delagrave
2 years
Ça n’a pas de bon sens! Le Québec se situe au deuxième rang international quand au nombre de décès en une semaine. Les hôpitaux sont au stade 4 du délestage. Les classes spécialisées ont fermé après 4 jours. Il n’y a pas de purificateurs HEPA ni de N-95.
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Nancy Delagrave
1 year
"“Governments are saying: Oh we can re-open because we have all these tools. But they are not available to the immunocompromised population. So, the monoclonal antibodies are no longer effective against the current variants."
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Nancy Delagrave
5 months
@jvipondmd @EvonneTCurran @JuliaMWrightDal @danfurst What an excellent op-ed, Joe! I have been saying for years that "Covid's effects on society is a slow attrition". The missing workers and students due to sickness, the steady rate of excess deaths, and the numerous long-term impacts on health and the economy.
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Nancy Delagrave
1 year
"Her voice is raspy and soft over the phone. She pauses when I ask how she is doing. “Well, I got COVID,” she says. “Again.”
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Nancy Delagrave
7 months
I want to scream. My 3 elderly and sick uncles and aunt could not get Paxlovid in 🇨🇦 because pharmacists discourage it. We got the @McKinsey / @pfizer pandemic response. All vaccination, no prevention.... get ready to spend 💰💰💰to treat or prevent long Covid. We are screwed.
@EricTopol
Eric Topol
7 months
More despicable price gouging at Pfizer Price of Covid-19 antiviral Paxlovid expected to rise 3-5X next year, by ⁦ @megtirrell
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Nancy Delagrave
3 years
We are being threatened by a novel coronavirus, yet there is a strong collective desire to think of it like our old foe, the flu. This might explain why. H/T @Jul101Vie
@YouAreLobbyLud
Dr David Berger, aBsuRdiSTe cROnickLeR
3 years
@Jul101Vie People aren't used to thinking on an existential scale and when they have to, they retreat into the familiar.
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Nancy Delagrave
8 months
2000 PPM. 4.2 % of the air breathed comes from the lungs of another person.
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Nancy Delagrave
2 years
This video captures how many of us feel after watching two years of public health policies on prime time.
@WarblerGrey
Fjord Pining
2 years
@DFisman With apologies to Alison:
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Nancy Delagrave
3 years
Which wave was the deadlier. The 5th in all age groups except for the 75 years old and above which had good vaccine coverage unlike the others who had just 3 %.
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Nancy Delagrave
1 year
🧵 1. "Where is the government's continued public health messaging regarding the potential impact on our long-term health if we catch COVID-19, even if vaccinated?"
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Nancy Delagrave
3 years
« C’est irresponsable. Selon les critères du Harvard Global Health Institute, on a vraiment dépassé le seuil où c’est possible d’ouvrir les écoles. » — Nancy Delagrave, physicienne et coordonnatrice scientifique du collectif COVID-STOP RIMA ELKOURI :
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Nancy Delagrave
1 year
I am so happy to see Covid-activism on a hospital wall. It gives me hope. We have this right and we will be not silenced. My society includes everyone and wants them to live their best life, be they athletes or immunocompromised persons. 💪🏼❤️
@COVID_Advocacy
COVID Advocacy Initiative
1 year
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