💥 Very important finding: Airborne infectivity of SARS2 🦠 decreases by ~90% within 20 min. The group hasn’t yet tested #Omicron —but overall, this work underscores that crowding indoors drives the pandemic. 🧵 #COVIDisAirborne cc: @EricTopol medrxiv.org/content/10.110…
“We report changes in the infectivity of the airborne virus over timescales spanning from 5 s to 20 minutes and demonstrate the role of two microphysical processes in this infectivity loss: particle crystallisation and aerosol droplet pH change.”
“A decrease in infectivity to ~10 % of the starting value was observable for SARS-CoV-2 over 20 mi, w/ a large proportion of the loss occurring within the first 5 min after aerosolisation.”
I’ll add that the methods the group used are quite elegant. “Controlled Electrodynamic Levitation and Extraction of Bioaerosols onto a Substrate” They suspend the aerosol in a chamber and applied it to permissive cells at different times. cc: @carlzimmer

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More from @macroliter

10 Dec 21
Friday afternoon epiphany. Team LabLeak are not "like creationists." They ARE creationists: (1) They claim humans 'created' the coronavirus. (2) They ignore evidence & move goal posts. (3) They come up with stats-based arguments that evince a total misunderstanding of evolution.
Listen to Susan Weiss. It’d be incredibly, incredibly hard to engineer a virus that has a presymptomatic infectious stage like SARS2 does. We don’t know how to do that. COVID-19 isn’t a human creation.
The idea that inserting an FCS into a coronavirus Spike just magically starts a pandemic is a little like assuming that buying a young tall boy basketball shoes will get you a Kobe Bryant.
Read 4 tweets
7 Dec 21
1/ Did you know @Vir_Biotech's Sotrovimab antibody neutralizes OG 2003 SARS & SARS-CoV-2 variants -- even #Omicron? Since Sotrovimab was cloned from the memory B-cells of someone who recovered from COVID19, many recipients of current vaccines will develop similar antibodies...
2/ The @Vir_Biotech Humabs team found Sotrovimab by looking for antibodies that neutralized both 2003 SARS & SARS-CoV-2... nature.com/articles/s4158…
3/ But what if we could develop vaccines that trained our immune system to produce "broadly neutralizing antibodies" that can inactivate all SARS-like viruses? Not such a new idea.. Similar strategies have been proposed for influenza & even HIV! nature.com/articles/natur…
Read 10 tweets
4 Dec 21
1/ We in wealthy nations not only hoard vaccines 💉. We also hoard the genome sequencing 🧬 reagents needed for early detection of dangerous new variants like #Omicron which— coincidentally— emerge much more easily in poorly vaccinated regions …🧵 ft.com/content/4597ed…
2/ This problem stems from short-sighted scientific & political leadership in the West, exemplified by the attitude of @emblebi @embl co-Director Rolf Apfweiler in his May 2021 quote to @amymaxmen. THESE WORDS HAVE NOT AGED WELL IN WAKE OF #Omicron 🤦🏻‍♂️ nature.com/articles/d4158… Fears of exploitation haven...
3/ This quote from Peter Bogner of @GISAID juxtapose hauntingly against Apfweiler’s .. (but please read the whole @FT piece ft.com/content/4597ed…) Screenshot of excerpt from ...
Read 9 tweets
26 Nov 21
👋Hi Journalists! Are you interested in covering the new B.1.1.529 #B11529 variant🦠? Here's a link to a TABLE with the names & institutions of THE PEOPLE WHO DISCOVERED THIS VARIANT & SHARED THEIR DATA via the @GISAID community.
PLEASE REACH OUT! 🙏 dropbox.com/s/vb6k9l6ekl24…
In Botswana you have, for example the source of
@GISAID Accession ID: EPI_ISL_6752027, virus sample collected Nov 21, 2021, these authors from the Botswana @Harvard HIV reference laboratory...
Let me tell you their names, Sikhulile Moyo, Wonderful T. Choga, Dorcas Maruapula, Keoratile Ntshambiwa, Sefetogi Ramaologa, Thongbotho Mphoyakgosi, Boitumelo Zuze, Botshelo Radibe, Legodile Kooepile, Ontlametse T. Bareng, Pamela Smith-Lawrence, Kgomotso Moruisi, Roger Shapiro
Read 10 tweets
25 Nov 21
JOURNALISTS … please! Scientists in Africa absolutely did share these viral genome 🧬 data as part of the GISAID community. That’s how @PeacockFlu was able to see it. Their work is how these variants are known at all. These scientists have names, too. 😠 newsweek.com/b-1-1-529-new-…
FOR EXAMPLE… here’s a thread 🧵 from one of the scientists in Africa who has helped lead this very important work.
Read 8 tweets
23 Nov 21
Speaking out that “COVID is airborne” was helpful and important. But muckraking on COVID-19’s origins is a bit tawdry, TBH. 🧵
I abhor gatekeeping but there are actual experts and it’s worth listening to them.
Where did COVID-19 come from? If you look at the most careful analyses, the wet market is screaming hot & underscores a very high likelihood of natural emergence.
Read 5 tweets

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