Yayyyy, I've managed to book my Covid vaccine booster shot for January 31! It seemed harder than it should've been yesterday, since there are three rival booking portals that I know of (?) which link to even more booking portals, many of which haven't updated their explanation text since before booster shots were permitted. Tried again today though and found something close by without much fuss, or disconcerting warning text. Jan 31 still feels like a long way away but at least I know I've done what I can 👍
On the internet, everyone knows you're a cat — and that's totally okay.