I had a discussion, yesterday, with an English visitor and his wife. They agreed that masks probably offered little protection but maintained "even if they reduce the risk of infecting someone else by just 1%, they are worth wearing".

I pointed out that they also increased the risk that the wearer would develop pneumonia or other infection because the warm, damp mask breeds bacteria. They didn't accept that hypothesis.

When I pointed out that I had covid last year and therefore had full immunity and couldn't possibly infect anyone, they told me "you should still wear a mask as a mark of respect to others".

Baaaaa.