A properly made surgical grade mask does offer protection to others, which is why surgeons and theatre nurses wear them.
No-one has ever claimed that they protected the wearer , so telling the public that they protected the wearer would quite frankly have been a lie.
In order to offer protection, the mask must of course cover both mouth and nose. I imagine, that like me, you have seen loads of people wearing theirs below their nose!
They should also only be used once, disposed of in a closed plastic bag and the wearer should then have disinfected hands.
I think we all know that few people bothered with all these precautions every time they wore a mask.
As yet I have never seen any statistics that prove conclusively that mask do not work in safeguarding others from Covid 19, so if anyone has an article that proves this, would they please post a link?