My ds1 had this as a newborn in hospital with no problem at all (3 years ago) - he did not even get any mark on his arm or blister. Ds2 had it over a month ago and has this week gotton the blister. It has got bigger and bigger and very very angry red. It does not seem to hurt him though. I was at hospital today with him for an unrelated matter and showed it to the doctor. He said that the vaccine has been changed and they are seeing many more cases "like this". I asked what to do and he said just to keep an eye on nit for a couple of weeks and maybe show to GP. They would m aybe have to drain it and give anti biotics. HE also briefly mentioned somethign about aniti TB tablets!
I have no idea what he is on about but am somewhat concerned. Does anybody know anything about this?