1) Quebec’s chief public health officer floated the possibility this week that Montreal may soon move from the highest #pandemic alert, red, to orange after observing a plateau of new #COVID19 cases in the past few weeks. In this thread, I will argue why this is premature.
2) At present, two acute-care hospitals in the city are grappling with #COVID19 outbreaks on their wards: St. Mary’s and the Montreal General. In total, 19 patients and 21 staff have contracted the #coronavirus at both. See the chart below from St. Mary’s on Wednesday afternoon.
3) What’s more, there are #COVID19 clusters in nine long-term-care centres (CHSLDS) in the metropolis, along with six in seniors’ residences, with the situation being described as critical at the Résidence Lachine, where one in five occupants are infected with the #coronavirus.
4) In my Twitter thread Tuesday, I noted #COVID19 outbreaks in the city workplace rose to 70 from 58 a week ago. The director of the Montreal public health department has also acknowledged that the lion’s share of infectious flare-ups is in schools and they're going up.
5) True, Montreal posted its lowest number of new #COVID19 cases in almost two weeks on Wednesday, with 205. But given that some people are avoiding getting tested, what’s more important to monitor are the outbreaks. And all indications are that outbreaks are still rising.
6) What’s also noteworthy is how the #coronavirus keeps moving around the island of Montreal in unpredictable ways. As you can glimpse from the chart below, #COVID19 cases appear to now be proliferating more in the west end than the north and east ends.
7) Although the recent number of #COVID19 deaths have been higher in the Montérégie and Quebec City regions, Montreal is sadly still posting many deaths. In the past two days, the city has added nine fatalities to a death toll that has climbed to 3,538. See the chart below.
8) These trends warn that should the government ease the partial confinement restrictions in Montreal, the city would likely face another #COVID19 resurgence. The question to ask is why Dr. Horacio Arruda would even talk of Montreal moving back from red to orange. End of thread.

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More from @Aaron_Derfel

6 Nov
1) Premier François Legault ruled out on Thursday easing #pandemic restrictions in Montreal during a plateau in #COVID19 cases. Turns out what the Premier did not say might be far more important than what he did say during his news conference.
2) Legault was responding to a report by the Montreal public health department recommending easing some restrictions, like allowing museums to reopen. He talked about the continuing risk that gyms, restaurants and theatres pose, but he did not discuss the risks in schools.
3) As I reported in the @mtlgazette tonight, one of Quebec’s foremost experts on infectious diseases, Dr. Karl Weiss, says that it’s schools in Montreal that are now driving transmission of the #coronavirus in the community, more so than the workplace. montrealgazette.com/news/local-new…
Read 10 tweets
4 Nov
1) Despite Health Minister Christian Dubé’s talk Tuesday of a stabilization of #COVID19 cases in Montreal, the latest figures show an upswing in the number of workplace outbreaks in the city. In this thread, I will examine the latest trend: more cases among workers in retail.
2) The number of workplace outbreaks in the metropolis climbed to 70 from 58 a week ago, and those employees testing positive for the #coronavirus rose by 25 to 221. What’s of concern is the number of #COVID19 outbreaks jumped by eight to 28 in shops. See the chart below.
3) With the Christmas season around the corner, more Montrealers will be shopping. For outbreaks to be rising in the retail sector so early doesn’t augur well during the second wave and suggests authorities should be paying more attention to this sector of the local economy.
Read 9 tweets
3 Nov
1) The age group that’s reporting the most dramatic increase in #COVID19 infections in Montreal — as well as the highest absolute number in the past two weeks — includes high school students. In this thread, I will revisit the topic of the #coronavirus in the educational system.
2) In the chart below, released Monday by the Montreal public health department, you will note that the 10-to-19 age group counted 581 #COVID19 cases in the past 14 days. That’s higher than any other demographic, including the often-cited 20-to-29 age group.
3) Since Aug. 25, just before the start of the school year, the number of #COVID19 cases in the 10-to-19 age group has soared by 104.38%, by far the biggest increase of any cohort. The next demographic that recorded the second steepest increase is the 5-to-9 age group (84.46%).
Read 10 tweets
2 Nov
1) Quebec’s schools are at what appears to be a worrying turning point in the #pandemic, with teachers who are exhausted, and with the weather turning cold, windows can no longer stay open in classrooms to provide ventilation. In this thread, I'll examine what’s happening.
2) Since Friday, three schools have announced they're closing temporarily after #COVID19 outbreaks: a private Montreal elementary and high school (Ali Ibn Abi Talib), a second in Boisbriand (Gabrielle-Roy, with the daycare shut, too) and a third in Trois-Rivières (Cardinal-Roy).
3) On Friday, the Education Ministry declared a record 2,377 active #COVID19 cases, with 1,934 infected students and 443 staff contracting the #coronavirus. In addition, 938 classes have been shuttered. The ministry doesn’t keep track of schools that have closed.
Read 9 tweets
1 Nov
1) Across Canada, some efforts are underway to improve ventilation in schools to prevent children and teens from contracting #COVID19. In Quebec, however, little is being done. In this thread, I will call upon the provincial government to do something fast.
2) I first urged authorities in Quebec to upgrade ventilation in schools in early August. On Sept.26, with most schools already open for a month, Education Minister Jean-François Roberge announced $20 million for the maintenance of existing ventilation, not upgrades.
3) That investment works out to less than $7,000 per school. Quebec, with one-tenth of Germany’s population, is investing 2.37% of what Germany is spending to upgrade the ventilation of its public buildings, including schools and universities.
Read 10 tweets
31 Oct
1) Montreal’s public health director finally acknowledged on Friday what many suspected — that it’s the schools in the city that are witnessing the biggest increase in both #COVID19 cases and outbreaks. In this thread, I will examine the implications of this in the weeks ahead.
2) Dr. Karl Weiss, one of Quebec’s leading infectious diseases expert, suggested at the end of September that the province’s second wave was triggered by the reopening of schools. Weiss told me recently he caught a lot of flak for making that remark.
3) For weeks, public health officials maintained that #COVID19 clusters in schools were merely a reflection of what was going on in the community. But on Friday, there were more outbreaks in the city’s schools (93) than in the workplace and health-care institutions combined (85).
Read 10 tweets

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