This is a good argument for everyone wearing Masks, given the numbers are correct.
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@Wifi_cable masks are definitely the right choice, but i do wonder how accurate the info is, because as far as i know the infectious doses are largely unknown (and differ hugely by person)
@Wifi_cable looking at the source linked by https://bettermasks.its-airborne.org/ "These numbers are just estimates based on the CDC's 15-minute contact tracing time, which has no scientific basis. And the more transmissible Delta variant (lineage B.1.617.2) may require an adjustment to a shorter contact time."
nevertheless, wear a mask, the best type you have access to :)