I’m a virologist. Public should know covid exposure dose matters. We have to conserve masks for healthcare workers, but masks can help anyone, reducing amount of virus released (even by breathing) or taken in. Immune system is more effective if infection starts w/ low dose. (1/3)
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Both reasons are not nefarious, but I would be more concerned if the SG is incompetent.
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Does it mean that if you do not reach 60%-80%, it would not be effective?
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