I go along with 3, 4 and 5 too, although 5 to a lesser extent, They are worn in Hospitals, but not in the way the public do, with the public you only have to stand in the street for 10 to 15 mins, and study those walking by, or into shops.
They fiddle with them, They wear the blue disposable's inside out (white on the outside), under the nose, etc
The disposable's are they say for a maximum use of 3 hours no more, less if they get damp, ideally chucked after taking them off after the first use I was told, but how many faded and tatty ones have you seen, that have been worn amd worn, stuffed in pockets, purses etc ?
Then you have a scarf, which I suppose just about works, but must be the least effective, and the fabric washable masks, but how often are they washed ? or just left in the glove box, or the pocket ?
We must also remember that close contact is still defined as less than 1 metre for more than 15 mins, don't recall WHO ever changing that ?
What is worrying is that some kids have been scared stiff with all this, was in Gloucester a few months back in a a Mall, Parent and youn girl walking up to a shop, girl must have been about 12 or so, I was waiting outside a store for the wife to come out, Girl stopped dead in her tracks, looked terrified, did not want to walk past me, or another person there waiting too, Parent said we will wait here, we both had to move away a good few feet beofore the girl would walk forward, but it was the look in her eyes that I remember... just so very scared ! what will heppen to her in a few years ? and many others too