This a very necessary read, I can't tell you how many times I have seen authorities worldwide say that a face mask made out of cloth is all that's needed to protect us against covid-19. In fact, here in my country (Venezuela) where there's practically no PPE for health professionals, and what little there is they usually have to buy it themselves, the minister of health called all med students to "help" at their local hospital using handmade cloth face masks (textual words), as that would "completely protect them".