Even surgical masks which don't form a vacuum around the mouth and nose help. A mask is not all or nothing, switching from 100% protection to 0% if it gets "com

Even surgical masks which don't form a vacuum around the mouth and nose help. A mask is not all or nothing, switching from 100% protection to 0% if it gets "compromised". And a mask is more like a raincoat, not like an umbrella. Raincoats also work against sprinklers ;)