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Nevermind an ethics committee, how the heck would you design the study?
And then ensure compliance?
And then consider so many confounders to make it pointless.
Hence- even the massive Danish RCT- all have been published with massive caveats.
deleted-
I suppose thats why Denmark's study was so inconclusive....it can only be done in a way that wouldn't otherwise harm people. I.e in a society with good social distancing, with pubs and bars shut and low covid rates.
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Nevermind an ethics committee, how the heck would you design the study?
Struggling to see how you could have a placebo mask for the control group for a double blind study.
Stonehedge
Brommers
Please tell me how a double blind study of masks and covid transmission would get past an ethics committee.