Quote:
Originally Posted by Peter_Spaeth
Well for one you're in the middle of an active pandemic, pretty hard to set up an RCT for masks on a global basis.
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I'll even assume that this is true and it is now impossible to use controls. Does it not still suggest that the earlier studies are better, because they use controls? Why should I ignore the science before March, 2020 and just accept whatever the CDC says after March 2020?