I don't know the answer to that, but Mr. J2 has had a very nasty skin allergic reaction all over his body and is hugely uncomfortable. They have completed a 'Yellow Card' which has to go in to log reactors. We are back at the surgery tomorrow now they've had a chance to confer. I have decided not to have the Pfizer vacc. and will wait for the Oxford-A-Z, since I already have a history of allergies - OH didn't have such a history.
You really need to talk to a doctor.