Face masks serve no purpose except to be theraputic. If you think it protects you, then wear one. During the first lockdown from March 2020, face masks weren't compulsory and few people were wearing them, and the infection rates and death rates dropped considerably, so wearing a face mask is futile. I've done a lot of shopping in my local convenience store where the staff have never worn one and none of the shoppers have either, not when I've been in, anyway. They weren't necessary. WHO did a backflip with face masks, first saying they weren't necessary, then saying they were. I don't believe they serve any purpose.