3 ms·

Can you link to the meta-analysis or RCT of mask wearing that were already published in March, or April, or June? But also, see this: https://www.nytimes.com/2

• gameswithgo 6y ago
  for covid in particular? it was widely known generally that masks reduce the spread of that class of virus.
• afthonos 6y ago
  Common sense dictates that the base belief should be “something that prevents my breath from going as far should be effective at reducing spread of an airborne illness.” The null hypothesis should be that masks help; alternatively, the prior should favor masks.