Masks do not even work as source protection.
The best evidence I have found shows that they make source infection worse even when N95s are used by trained surgeons.
Now, imagine how well a cloth mask works on kids in a classroom.
https://www.medrxiv.org/content/10.1101/2020.03.30.20047217v2
The best evidence I have found shows that they make source infection worse even when N95s are used by trained surgeons.
Now, imagine how well a cloth mask works on kids in a classroom.
https://www.medrxiv.org/content/10.1101/2020.03.30.20047217v2

