Face masks: a lot of bang for the buck!

There is good reason to believe that wearing a mask is a very low-risk protective measure which can deliver a large positive impact. In other words, masks deliver a lot of bang for the buck.

 

 

 

 

 

 

https://www.pnas.org/content/118/4/e2014564118?fbclid=IwAR0acQLrK5uzFbEsJE5E7lDgkcBVPB7b_2CjhPAy2yG2jDzEJ5H5ekpwVIk