Link to source (Bacon’s Rebellion).
The article makes the sensible point, at length, that face masks can stem the transmission of a virus. Significantly, wearing a mask in public may not protect you from being infected by others, but can protect others from being infected by you. I expect we’ll be hearing more about this as time goes on.
The notion holds for both complex manufactured face masks and simple, homemade ones. One also needs to know how to put on and take off a medical mask.