This is among the crucial questions - what is minimum effective filtration/fit for ~definitive protection? - of the aerosol debate
If less than N95 is effectively similar, that opens up many low-hanging possibilities for scalable highly protective masks for the publichttps://twitter.com/j_g_allen/status/1293298339694481414 …
It's a pandemic! Alternative; lunch outside in wedding tent canopy; screen sides. Put in heaters if cold. Dunno, whatever it takes. (Same problem with schools; everyone is freaked out about kids—which I get—when the biggest threat to address is clearly staff-staff transmission).
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Fortunately my city’s numbers are way down so the risk of staff-staff transmission is much lower. And that’s why school opening should be based around local statistics, because yes staff-staff transmission is my main concern and maybe kids bringing it home to parents?
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