Also this is another example for the importance of masks for source control (asymptomatic spread plus droplets). Many still don't understand this crucial distinction: masks to *prevent* transmission. (Working on article right now!)https://twitter.com/zeynep/status/1251171855286906880 …
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You can cough for many reasons.
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Just by breathing I believe. You need a longer (and maybe closer) exposure obviously, but transmission is possible.
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Talking loudly. Singing. Exhaling.
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I'm not ill, but I routinely sneeze 10 or more times per day. It has been that way for years.
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I sneeze because of hayfever. I could be asymptomatic for covid but spreading droplets all over.
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