Looks like they did quite a bit more than “wear masks”. Plus, note double-layered masks...
Yes, given the amount that they did you would expect a clear effect if masks do a decent job at protecting wearers.
One possible explanation is that COVID-19 mostly spreads through aerosol transmissions where a cloth masks doesn’t do a good job.
If that scenario is true measures for air quality are more important for mask wearing. I still believe that there are conditions where it makes sense to wear a mask because of the precautionary principle, but as the title of this post suggests the evidence really isn’t that clear.
Yes, given the amount that they did you would expect a clear effect if masks do a decent job at protecting wearers.
One possible explanation is that COVID-19 mostly spreads through aerosol transmissions where a cloth masks doesn’t do a good job.
If that scenario is true measures for air quality are more important for mask wearing. I still believe that there are conditions where it makes sense to wear a mask because of the precautionary principle, but as the title of this post suggests the evidence really isn’t that clear.