Obviously the mask does nothing. I’m quite sure masks are being used virtually all the time by everyone in China when people go out in public (every time I see footage of a crowd the people are using masks) and yet they are seeing a million cases a day??? Or likely more. Really, the mask is utter nonsense because the average person does not wash their hands 12times a day, or replace their mask every few hours... touching your mask with dirty hands throughout the day just leads to contamination and spreading of the virus... I learnt this at a hospital when they hired me. They told us, if you don’t replace your mask several times a day, you may as well not wear it at all, it will actually increase chances of sickness