Whilst I am not averse to jags, one of my COVID ones resulted in something called SIRVA. Three years on, I am still suffering. The Jag was given too low down in my arm and damaged the muscle at the top. I still have a lot of aches and pains, movement is ok and the only " cure" is steroid injection which the surgery is not willing to do. Maybe because it was administered at their surgery........the phlebotomist is very good at taking blood but maybe not good at jags. It's one of those odd occurrences. It does make me a teeny bit hesitant. I think these jags are necessary for people with underlying health conditions but those who feel that it's not going to happen to them, need to think seriously about refusing , but at the end of the day, it's a personal choice, nobody enforces it.