Where is the evidence of this? A complete load of claptrap! Why do surgeons wear masks in an operating theatre?Is it all double dutch ?
The nation's top scientists, having examined key data and research, have declared there is no firm evidence to back the use of face coverings. Indeed, they argue that wearing the wretched things may actually hamper the fight against disease
If you keep your germs to yourself you LIMIT the spread of the virus. It is spreading again because a lot of folk are just plain stupid and selfish, in not wearing a mask in social gatherings, shops etc.