There was something dodgy about those blue masks. I had to wear them for some hospital appointments in 2021/2022 and got weird raised spots behind my ears, on and below my nose and on my cheeks and lips. They took ages to go away and it was only colloidal silver that really removed them in the end, after 6+ months of treatment. This was from maybe 8 hospital visits? Fortunately, my work allowed us to use our own masks, and only when not sat at our desks, so I had a super-thin cotton one my wife made me. The hospital workers though? They had to wear them every single day, on top of the jabberoonies.

I have noticed quite a few colleagues with nasty face rashes that won't heal even now though, and we've not had to wear masks in over 2 years. I remember the media calling it "mascne" (clumsy portmanteau of mask and acne), as though your whole face breaking out in a rash is a perfectly normal thing to happen.

I also live in an English university town, for reference - though probably not such a famous one!