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Eric Feigl-Ding Profile picture
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17 Mar, 8 tweets, 4 min read
I warned that many schools will end up buying ineffective crap air cleaners like ionizers (crap!) instead of things that work like HEPA filters & UV if no prioritization in school relief aid package.

Lo and behold - @smartrestartaps @HeidiNBC—my earlier sinking fears confirms.
2) We need good safe indoor air quality. Achieved via either natural ventilation (windows or HVAC) or via air cleaning via HEPA filters or UV disinfection (both CDC recommended).

Here is the latest CDC school air quality guiadance for #COVID19
3) So much JUNK air products out there. Beware.

“I would estimate that the air-purification industry as a whole is 50 to 75 percent illegitimate. You’re dealing with an industry that doesn’t want consumers to understand these devices and how they work.” nymag.com/intelligencer/…
4) Here are good air cleaning HEPA filters meantime — some with better CADR values to clean larger rooms. CADR stands for CLEAN AIR DELIVERY RATE in cubic feet per minute.

More CADR the larger room a HEPA can cover. Just calculate volume of room and then determine ACH per hour.
5) here is another version of the HEPA filter comparisons. The top left corner is best in terms of cost and room cleaning.

Figure made by @marwa_zaatari.
6) I explain CADR more in detail below. Once you know CADR of your cleaner and the room volume, you can calculate the air exchange per hour. Aim does 5-6.
7) And does HEPA filter reduce #COVID19 risk? Yes! Peer reviewed study below.
8) Can’t afford a HEPA or UV? Then make your own Corsi Box! See thread 🧵 below.

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More from @DrEricDing

Eric Feigl-Ding Profile picture
18 Mar
REINFECTION? Fauci battled with Senator @RandPaul who insists there’s no reinfection.

Actually—big study on this exact topic just yesterday in **4 million** Danish people found—prior #COVID19 infection only protected 80%, & even lower 47% in age >=65! 🧵
2) Hell yes there is a study just yesterday. And hell yes it was done in over 4,000,000 with 10 mil tests—basically everybody in Denmark! Like the entire country.

So hell yes it is the most comprehensive study in the whole world on #COVID19 reinfection.
thelancet.com/action/showPdf… Image
3) The paper specifically says: “Through analysis of Danish population-level surveillance data with more than 10 million person-identifiable PCR test results in 2020, we estimated protective immunity to be approximately 80–83% in people younger than 65 years.”
Read 5 tweets
Eric Feigl-Ding Profile picture
18 Mar
BREAKING—White House plans to send 2.5 million doses of the Oxford-AstraZeneca #covid19 vaccine to Mexico and 1.5 million to Canada. 30 mil doses sit in warehouses.

This comes just as US quietly pressing Mexico to curb migrants coming to the border. nytimes.com/2021/03/18/wor…
2) Tens of millions of doses of the vaccine have been sitting in American manufacturing sites. But while their use has already been authorized in dozens of countries, the vaccine has not yet been approved by American regulators. Hence the unused stockpile building.
3) The reason it has not been approved is that it had not be formally submitted to the FDA yet. AstraZeneca has focused on Europe more. US already has 3 approved vaccines.
Read 7 tweets
Eric Feigl-Ding Profile picture
18 Mar
⚠️ICU hospitalization trend and #COVID19 in Brazil.

If you still say nothing is wrong, still try to downplay that the #P1 variant-driven surge is overblown—please go search for your humanity.

The world needs humanitarians who will advocate for saving the people of Brazil. Image
2) International media is finally catching up on the reporting. It’s horrendous in Brazil. They need intl help. Even young adults are dying more.
3) the rest of the world cannot ignore the crisis in Brazil any longer. Brazil’s hospital system is being completely crushed. It needs international aid, or else #P1 will trigger another pandemic if it proliferates around the world—because it is even more contagious than 🇬🇧#B117.
Read 6 tweets
Eric Feigl-Ding Profile picture
18 Mar
Tragedy in a part of Brazil 🇧🇷—soaring #COVID19 hospitalizations and mortality one of the wealthiest states with the best hospitals (exceeding that of most in the US). Imagine the rest of Brazil.

Brazil needs help—their #P1 variant is more contagious than any studied so far. 🧵 Image
2) No need to imagine... because here is the stark worrisome data. Hospitals are so overload that accessing ICU beds is now virtually impossible.
3) There is now sobering reports that more and more young adults are dying of #COVID19 in Brazil. I wouldn’t be surprised if forthcoming studies on #P1 variant shows it maybe also more severe.
Read 4 tweets
Eric Feigl-Ding Profile picture
17 Mar
Brazil's latest #COVID19 wave is becoming tragic beyond measure. 🇧🇷 has “plunged into crisis”. Patients are dying waiting for ICU beds. #P1 variant is 2-2.5x faster transmission. More younger 20-30s patients now dying, unlike before.🧵

Thx @MattRiversCNN
2) Brazil is facing the largest health crisis in its history. the world needs to wake up and step up now!
3) “Access to ICU facilities is nearly impossible” says @MattRiversCNN
Read 8 tweets
Eric Feigl-Ding Profile picture
17 Mar
DEAR GOD—“The largest public health & hospital collapse in the history of Brazil 🇧🇷”—wow.

➡️ 25 of 27 Brazilian state capitals have ICUs capacities between or above 80%, 19 are higher than 90% capacity. #P1 variant is 2-2.5x more contagious. 🧵#COVID19
agencia.fiocruz.br/observatorio-c…
2) This is the humanitarian crises that is unfolding in Brazil. The deaths are mounting with no end in sight as well. #P1 variant is just that brutal.
3) Fiocruz (Brazilian CDC): “the largest health and hospital collapse in the history of Brazil”. Almost 3K dead today. The southernmost state of Rio Grande do Sul notified 502 dead, a massive new state record by a large margin.
Read 17 tweets

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