In article , Basil Jet
writes
It is obvious that wearing a mask makes the
wearer safer.. it would defy the laws of physics if it didn't,

Rubbish.

Assuming it's the typical mask that the public buys, the virus sticks to
the outside of the mask and then has time to migrate in. But it doesn't
fly off after it's migrated out. Which is why it protects others but not
you.

(My source is a senior researcher on influenza and Covid-19 at the CDC
in Atlanta. I'll believe him any day.)


Do you really believe that a single virus landing on the outside of a
mask has a 100% chance of migrating in and infecting the wearer, so
there is 0% chance that the mask could save the wearer?

I didn't say that. But it's almost certainly not a single virus
instance. Yes, a mask might reduce your risk by 0.001%, but that's not
what the person on the Croydon tram would call "safer".

--
Clive D.W. Feather