It's a parent's choice to send their child to school carrying a sharp little knife
What I hear when I hear “parental choice” and “unmask the kids”
Devil in the details: how masks et al could fail to control COVID-19 but still control seasonal influenza
It is entirely reasonable that the same control measures (masks, distancing, et al) that are failing to control COVID-19 could be controlling influenza well. The devil is in the details.
Mask disclaimers and liability – a response to a Facebook commenter
Liability and cost are why boxes of disposable masks claim to be "not for medical use." The masks will still help reduce COVID-19 transmission.
Masks, molecules, COVID-19, and their relative size
If a mask blocks carbon dioxide, it will be fantastic against COVID-19. And a mask doesn't have to be able to block individual viruses to reduce transmission.
The Daedalnexus 