I have read that people who wear masks are still getting small amounts of virus particles when they are out in public, and as a result they are developing at le

I have read that people who wear masks are still getting small amounts of virus particles when they are out in public, and as a result they are developing at least a weak response. This results in less severe illness when/if the person receives enough of the virus for it to become infectious. I don't remember where I read this, or I'd post a link. Either way, it is an interesting theory which has not (yet) been proven.