What about MUDs? I haven’t played them myself but would love to try one afternoon.

This is the kind of thing I’d like to have downvotes for

The Retrospecs iOS app can mimic this: https://apps.apple.com/us/app/retrospecs/id887031094

I think it’s just that the bivalent booster was targeting (a) an extinct variant and (b) a different Omicron subvariant. This will target some form of Omicron XBB, I think, which has been the dominant strain for months now.