Most face masks won’t stop COVID-19 indoors, study warns

In light of these findings study authors recommend that everyone wear a N95 or KN95 mask if possible whenever indoors in the company of others. “A lot of this may seem like common sense,” Prof. Yarusevych comments. “There is a reason, for instance, that medical practitioners wear N95 masks – they work much better. The novelty here is that we have provided solid numbers and rigorous analysis to support that assumption.” It’s also worth mentioning that ventilation tests show even modest ventilation rates provide about the same level of protection as the highest quality masks.

Source: Most face masks won’t stop COVID-19 indoors, study warns