MASK WEARING IN SCHOOLS—New CDC survey of middle & high school students of fellow students mask wearing—

📌60-65% of students reported fellow students wore a mask “all the time” in classrooms, hallways or stairwells.

📌school buses (42%)

📌restrooms (40%)

But... 🧵#COVID19
2) But mask wearing drops a lot when:

📌cafeteria (when not eating) (36%)

📌sports or extracurricular activities (28%)

📌outside on school property (25%)…
3) These numbers are quite low. Shockingly low. Granted a lot of these 3,953 middle and high school students with in person classes are schools in states with looser or no mask mandates. But I’m most worried about mask wearing with such mediocre to low prevalence.
4) I believe these low numbers. And I expect some schools to have even lower—especially in more conservative states.

Case in point - a high school basketball 🏀 game in Missouri.
5) We need better mask enforcement for sure, but we need ventilation and air cleaning just as much as masks. Good air exchange is more effective since it doesn’t rely on student compliance and better for school lunches that are unmasked. Here is my long ventilation 🧵 below.

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More from @DrEricDing

22 Feb
When I promised all of you Biden listens to scientists, I meant it. 👇
2) Like I said... promises made, promises kept....

Our TV 📺 ad months ago...
3) In contrast to [he who shall not be named] and ignored warnings of doctors and us epidemiologists...
Read 4 tweets
22 Feb
📍OUTBREAK OF #B117 AT SEVEN SCHOOLS—sudden outbreak of #COVID19 cases at a British Columbia 🇨🇦—all elementary and middle schools. Genetic sequencing shows #b117 in early cases linked to outbreak. Classes quarantined. All the schools still remain open. 🧵… ImageImage
2) British Columbia 🇨🇦 teachers are now incredibly worried by the latest sudden 7 school outbreaks, and demanding decisive actions.
3) British Columbia is having a major increase in transmission — and has the highest R in Canada 🇨🇦 currently.
Read 20 tweets
22 Feb
COVID hidden in lung 🫁 transplant—transplant recipient tragically dies after receiving donor lungs, unbeknownst infected with #COVID19. The surgeon also contracted same #SARSCoV2—both infected from the dead donor’s lung, verified from genetic sequencing.🧵…
2) “Doctors say a woman in Michigan contracted Covid-19 and died last fall two months after receiving a tainted double-lung transplant from a donor who turned out to harbor the virus that causes the disease — despite showing no signs of illness and initially testing negative.”
3) “Officials at the University of Michigan Medical School suggested it may be the first proven case of #COVID19 in U.S. in which virus was transmitted via an organ transplant. A surgeon who handled the donor lungs was also infected with the virus & fell ill but later recovered.”
Read 8 tweets
21 Feb
AIR DISINFECTION—To reduce airborne #SARSCoV2 risk, new study finds HEPA cleaners, with total air exchange rate of 5.7  ACH/hour, after 2 hours in closed room with a highly infective person—the inhaled dose is 6x reduced!

➡️We need these for schools.🧵… Image
2) In times when classes were conducted with windows and door closed, the aerosol concentration was reduced by more than 90% within less than 30 minutes when running the purifiers (air exchange rate 5.5 /hour)—and decreased by more than 95% within 37 minutes. Image
3) A **halving of the particle concentration was reached in 10.0, 7.0 or 5.4 minutes** (green, black and red lines, respectively), depending on the total flow of the purifiers.

The blue line shows a typical slow decrease when no purifiers were used. Image
Read 17 tweets
21 Feb
~90% SUCCESS AGAINST TRANSMISSION—the newest Israel 🇮🇱 study shows the Pfizer/BioNTech vaccine is 89.4% against all lab confirmed infections—which show the vaccine may also prevent asymptomatic carriers from spreading the virus that causes #COVID19. 👏…
2) In Israel, nearly half the population has at least 1 shot of vaccine. And 4 out of 5 infections during the study period in Israel were the #B117 variant from the UK. So it’s pretty good for B117 too.
3) The other recent Israel study says the Pfizer / BioNTech vaccine is 85% effective after 1st done and 75% for asymptomatic transmission — again just 1 dose after initial 2 week immunity building period.
Read 5 tweets
21 Feb
Sobering NYT cover tomorrow—almost 500,000 confirmed deaths from #COVID19 in the US.

Excess mortality in the US is even higher.

Don’t look away. Pandemic is not over. Be vigilant. #doublemask
2) US total excess mortality from the pandemic is meanwhile approaching almost 600,000 soon... sobering.
3) Meanwhile US has lost a full year of life expectancy in the first half of 2020 alone. 2.7 years of life lost for black Americans. 1.9 years lost for Hispanic Americans. 0.8 lost for whites.

Let that sink in.
Read 15 tweets

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