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Re:Covid: Summary of lab-origin hypothesis by mejutoco on Tuesday September 06, 2022 @09:06AM (#32736570)
I think it is difficult to do a RCT of Covid (many different variants, vaccines, variability in symptoms), but it is a very fair point. Thank you.

There are RCT for influenza and other diseases Sars (1):

https://pubmed.ncbi.nlm.nih.gov/22280120/

https://www.pnas.org/doi/10.1073/pnas.2014564118

While maybe we do not have the gold standard study, I think it was the right decision, given how little inconvenience masks have, for the much bigger benefit of reducing Covid risks.

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