JUST IN—CDC is changes how “close contact” is defined. Instead of previously defining “close contact” as >=15 *consecutive* minutes w/in 6 feet of #COVID19 case, it’s now w/in 6 feet of an infected case for >=15 minutes cumulatively over 24-hours. Huge. 🧵 washingtonpost.com/health/2020/10…
2) “The change by The Centers for Disease Control and Prevention is likely to have its biggest impact in schools, workplaces and other group settings where people are in contact with others for long periods of time.”
3) “The updated guidance is based on new evidence: CDC and Vermont health officials discovered infection of a 20-year-old prison employee who interacted with individuals who later tested positive for the virus after 22 interactions totaling 17 minutes during an 8-hour shift.”
4) “Available data suggests that at least one of the asymptomatic [infectious detainees] transmitted” the virus during these brief encounters, the report said.”
5) Bottomline: the old definition of within 6 feet for 15 consecutive minutes was too limited. Cumulative aggregate exposure can lead to infection.

I still don’t know if the 15 minutes and 6 feet rule is sufficient given what we know about airborne transmission via aerosols.
6) distance isn’t what always matter. Studies indicates that coronavirus could be persistent and stable up to 16 hours in stagnant air. Typical air exchange every 20 min to 4 hrs, depending on ventilation. #COVID19
7) Here is the link to the latest Vermont prison outbreak that was because of 17 aggregate minutes of intermittent visits that led to the infection of the prison guard from asymptomatic inmates. This virus is just that subtle and perniciously persistent.
8) And not to spoil anyone’s day, but NZ contract tracing says 3 minutes of casual exposure can lead to an infection. NZ cases are rare, so unlikely any other source.

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More from @DrEricDing

23 Oct
⚠️WOW! Epic move—Germany is investing $488 million (€500m) in improving ventilation systems in schools & public buildings to help stop the spread of #COVID19. Merkel’s govt is awarding grants of up to €100,000 each to upgrade air systems to stop transmission! US needs that too!
2) this is incredibly necessary given what we know of airborne transmission. bbc.com/news/world-eur…
3) ventilation is key. Japan assumed it was airborne from the very beginning. Hence their mask culture and their focus on air refresh and stale air clearance. #COVID19
Read 4 tweets
22 Oct
Holy shit—a Dutch security researcher “ethically” hacked into Trump’s Twitter account by pure dumb luck of typing in “maga2020” as the 5th password attempt. And it worked! Trump didn’t use 2 factor authentication either. WTH. 🤦🏻‍♂️volkskrant.nl/nieuws-achterg…
2) And yes this story is real.

On October 16, 2020, Victor Gevers decides to check in on Trump’s account. Just to see if it is still safe.
3) “I always run random checks. Whenever someone is in the news, I monitor. I ran a check on the Biden, Pence and Harris accounts. Anyone receiving media attention is a potential target and deserves protection. Regardless of who they are.” vn.nl/trump-twitter-…
Read 12 tweets
21 Oct
⚠️YOUNG ADULTS TRIGGERING OUTBREAKS—“Young people packing downtown bars in Sept, crowded closely and often unmasked. Over a month later, a devastating spike in #COVID19 cases in the student-age population, spread throughout the community & killed elderly”. washingtonpost.com/health/2020/10…
2) “For most of 2020, La Crosse’s nursing homes had lost no one to covid-19. In recent weeks, the county has recorded 19 deaths, most of them in long-term care facilities. Everyone who died was over 60. Fifteen of the victims were 80 or older.”
3) “The spike offers a vivid illustration of the perils of pushing a herd-immunity strategy, as infections among younger people can fuel broader community outbreaks that ultimately kill some of the most vulnerable residents.”
Read 4 tweets
20 Oct
NEW—Largest CDC study on mortality to date pegs #COVID19 associated excess deaths at 285k. But that is not all. There are huge % excesses deaths, especially in young adults 25-44 and in Hispanic, Black, Asian, Native American minorities. Whites less so.🧵 cdc.gov/mmwr/volumes/6…
2) Here is the excess Covid mortality by age groups. Young adults 25-44 had the largest excess mortality overall - hitting 50% in mid July. The first March-April wave’s 1st peak hit elderly the hardest. But 2nd peak hit young adults more. #COVID19
3) As for minorities, Hispanic & Black and Asian minorities all exceeded 100% increase over baseline in March and April. Non-Hispanic whites was under 40%. In the second peak in summer 2020, Hispanics were hit the hardest. But black, Asian & Native American suffered 50% excess.
Read 6 tweets
20 Oct
⚠️BREAKING—Huge CDC study says #COVID19 not only caused 285,000 excess deaths— but CDC also found, surprisingly, that it has struck 25-44-year-olds very hard: Their “excess death” rate is up 26.5% over previous years, the largest change for any age group! washingtonpost.com/health/coronav…
2) ““The number of people dying from this pandemic is higher than we think,” said Steven Woolf at Virginia Commonwealth University, who has conducted independent analyses of excess mortality. “This study shows it. Others have as well.”
3) “The data cover the period Feb. 1 to Sept. 16, meaning that excess deaths have almost certainly reached 300,000. Woolf said they are likely to hit 400,000 by the end of the year. The numbers were assembled by the National Center for Health Statistics, a unit of the CDC.”
Read 9 tweets
20 Oct
⚠️DIED ON THE TARMAC—A woman in her 30s died of #COVID19 while she was on a plane about to take off. Before the woman died, she had trouble breathing and was given oxygen. Died suddenly literally while on tarmac. COVID is no joke, even for 30 year olds. buzzfeednews.com/article/tasnee…
2) yes she had some underlying risk factor. But you know, 1/3 of America has one too — it’s called obesity. Tons more have diabetes, high blood pressure, high cholesterol, heart disease, and more. Many of them present in young people.
3) “Jenkins said that the woman's death was a "reminder that there is no age restriction in COVID."

"I would strongly encourage people to not think they’re invincible from COVID because they don’t think they’re in a high-risk category," he said.
Read 4 tweets

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