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Cake day: June 12th, 2023

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  • Something like a surgical mask can help a bit even if other unmasked sick people are around (though it’s pretty minimal, less than 10% IIRC), but nowhere near as much as a proper respirator. It’s something like 25%-40% more effective vs. without one, and it goes up from there to 90%+ if everyone is wearing one and they are properly fitted. Some respirators don’t protect anyone from a sick wearer (like painter’s masks with cartridges and an unfiltered exhaust) but others do (like N95s/FFP2s). For the purpose of this article, “respirator” refers to stuff like n95s though.