6/ So 2 main players: drops & aerosols. 2 pieces of evidence suggest relative importance: - Pandemic driven by superspreading events (eg https://www.nytimes.com/2020/06/30/science/how-coronavirus-spreads.html …). Easy to explain w/ aerosols. Harder w/ drops. Transmission requires “prolongued close contact” (PCC).
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In places with adequate testing/contact tracing, the vast majority (95%+) of cases can be traced back to specific contacts This is a really important point
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What do you think of this vs what you said? (Genuine question)https://www.cnbc.com/amp/2020/07/03/more-than-half-of-people-infected-with-covid-19-dont-know-source-cdc.html …
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If a large proportion was fomite we would expect this even more as we would get cases where people touched a surface some time later. The fact that most can be traced suggests transmission is happening when the case is present or immediately after regardless of route.
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Absolutely. From my understanding, the best evidence points largely to short-range droplet spread, with fomites and aerosols both contributing somewhat
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Flawed argument, explained below. Consistent for virus not very contagious, need high concentration, long time. Easiest face to facehttps://twitter.com/jljcolorado/status/1282327369152262144?s=19 …
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And if it was droplet nuclei style in air a LONG time - given high viral concentrations in upper aerodigestive tract early- the household attack rate would be massive and the Ro in the 8-12 range. So-mostly close -med range bigger droplets? We need clear, consensus terminology
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Typical room turnover times are 15 mins. So “hang out” doesn’t mean forever.
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