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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This "false sense of security" argument has been trotted out against many safety devices (seat-belts, helmets) and the evidence does not bear it out. No reason/data to think different for face masks. If anything, it's the other way around. See more here: https://www.preprints.org/manuscript/202004.0203/v1 …pic.twitter.com/oIPsKROAuH
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Replying to @zeynep
Purely anecdotally, I don't feel 'safer' wearing a mask (even if I am), I feel more aware of the risks around me. The fact that wearing a mask isn't comfortable is a constant reminder that my environment is potentially hazardous. My mask reminds me that things are not normal.
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I’m guessing this rationale for wearing masks is not really getting through. Masks are much better at stopping the wearer from exhaling virus particles than at blocking them from inhalation. So… if everyone wears a mask, those who are infected limit the spread.
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I'm co-writing a piece clarifying this right now. (It's in copyedit stage, out soon!).
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After living in Asia for 20 years, I am hoping that from now on, I will not be the only person who puts on a mask when I have a cold as a courtesy to others.
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I’ll be interested to see, sociologically, if this changes western societies, where there is a different sense of responsibility to the community. This virus is exposing the lies of the ideology behind rugged individualism. It’s often utter selfishness and disregard for others.
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