Sadly, I don't think we can safely open indoor restaurants. The good news is one asymptomatic person did *not* infect 81 people in that restaurant. The bad news is *one* asymptomatic person infected ten people in line of air flow. No fever, can't screen.https://twitter.com/LadyBrienne1/status/1251853128498057218?s=20 …
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People asking me questions: Study above strengthens case for masks. I try to read key papers. Still many unknowns. PERSONALLY, (not advice, just me!) I try to avoid spending time indoors with others. I feel increasingly comfortable outdoors. I wash my hands after opening boxes.
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We now know *for sure* mass transmission is possible indoors even without coughing/sneezing (pre/asymptomatic). We should all wear masks. I'm not yet seeing many cases of outdoors/surfaces but we should STILL be careful while we wait for studies. Absence of evidence isn't proof.
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Also, please note that coughing/sneezing are game changers to the distances we have all been told—especially sneezing—and that's another big reason to recommend universal masks, especially indoors. Many unknowns remain but this we know for sure: CROWDED INDOORS ARE HIGH RISK.
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zeynep tufekci Retweeted Justin Gray
Georgia is considering opening retail, restaurants, nail salons, in-person worship and other indoor places next week. Please feel free to share the study on top of this thread with your friends there: one asymptomatic person in a restaurant infected 10.https://twitter.com/JustinGrayWSB/status/1252330712092590080 …
zeynep tufekci added,
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Check this example flagged by
@jeremyphoward in his super useful FAQ on masks. *94* out of 97 cases in a building worked on the same floor! It really suggests transmission through air is much more important than surfaces like elevator/doorknobs. Mask up! https://www.fast.ai/2020/04/20/skeptics-masks/ …pic.twitter.com/XVF9WeJbig
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Can't believe this gets published by the BBC, this late! If you're worried masks can be contaminated by other people's cough and sneezes, what do you think happens to YOUR MOUTH AND NOSE IF you aren't wearing a mask? The other two also make no sense.
https://www.bbc.com/news/health-51205344 …pic.twitter.com/PaPnE1490S
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Replying to @zeynep
Tired to see the argument, I created the chart to show the impact. It's like a huge experiment at the cost of thousands British lives. So sad. Wearing mask is essential now and after we lift the lock down, finger cross.pic.twitter.com/YFi0FrmcTN
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Replying to @weijenlo168
That is a very sad experiment, indeed. You should consider publishing that somewhere/anywhere with link to sources.
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Replying to @zeynep @weijenlo168
You should publish that on Github with a script to regenerate the plot from sources (or as a Google Sheet). Someone could then do a v2 with curves from every other mask on/off country. It’s aggregate observational data but causal mechanism is plausible.
1 reply 2 retweets 16 likes
I agree! This is something good to keep track of. It's not conclusive but country after country... It's a strong signal.
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