🧵Most people don't realise there are whole categories of disease transmission they don't have to think about because they've been taken care of by society, e.g. there are laws & inspections & engineering that protect you from diseases that are waterborne (e.g. sewage treatment),

https://twitter.com/1goodtern/status/1989607246565683401

bloodborne (e.g. blood product screening), foodborne (e.g. food hygiene legislation).
The only thing public health generally tells people to do is wash their hands. So that must be all people need to do, right?
Nope. This does not protect you from airborne diseases, like covid,

A 🧵 about how hard it is to get Covid-safe health care:
Going for a routine cardiology appointment, I rang ahead to ask if the doctor could wear an N95.
When I arrived she was in a surgical mask.
I said, “Would you—?” and she cut me off, saying “I’m not wearing one of those.' She'd moved my chair back against the wall opposite her desk (maybe 6ft away) and said at that distance we should be fine.
I said, “It accumulates in the air.”
She then told me that the air conditioning duct above us would be blowing air from me towards her (it … did not).