The US Centers for Disease Control and Prevention has updated the mask information for Americans and has stated that some masks and respirators provide more protection from COVID-19, compared to others.

A CDC statement said that masking is a crucial tool to prevent the spread of COVID-19, and any mask is better than no mask. The update recommends that people of America should wear the most protective mask or respirator that fits well and that they will wear persistently. The guidelines stated that it is most important to wear a well-fitted mask or respirator that is comfortable and offers good protection. The agency said that loosely woven cloth coverings provide the least protection, while layered finely woven ones provide more protection. It added that well-fitting disposable surgical masks and KN95s offer even better protection, and well-fitting respirators (including N95) provide the highest level of protection against the virus… (CNN, January 15, 2022)