....therefore if other people are wearing masks then that cuts the chances of THEM infecting YOU.
If YOU don't have/get it you can't pass it on to someone else.
Personally not convinced but with the number of cases going nuts overseas if there's some benefit Vs personal "preferences" probably a fair price to pay.
Anyone who's got this virus pegged and want's to pontificate to the masses the future - go ahead, throw in the winning tattslotto numbers for next week and you'll have my fullest attention!