12 h, jan 28, 2020 y - Mercury Times: No need to wear surgical masks or the N95 respirators
Description:
https://www.mercurynews.com/2020/01/28/coronavirus-masks-do-they-do-any-good/Added to timeline:
Date:
12 h, jan 28, 2020 y
Now
~ 5 years and 8 months ago