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New Covid wave has begun and masks should be worn again, scientists warn
(www.independent.co.uk)
this post was submitted on 17 Aug 2023
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Be kind and wear a mask until it's settled that they don't help. What we know for sure is that it's very hard to measure whether they're effective or not.
FWIW, they definitely do work. The issue is that it's quite hard to produce effective studies to confirm if they work one way or another to point to to say "see, we've proved they work, now put one on!"