On Tue, 30 Mar 2021 11:03:36 -0000 (UTC), Scion
wrote:

snip

There's always the chance that they actually caught Covid a short while
before having the jab and the 'reaction to the vaccine' was Covid symptoms.

Ah, that's a good point.

Whilst that can't be ruled out, they are generally very careful with
it all and so think would have got it sooner than just before getting
the jab (but not impossible of course).

Cheers, T i m