After opting for separate mumps, measles and rubella vaccinations for our 2 chn years ago we have been fighting against giving them a combined MMR booster. We finally gave in to pressure a month ago. Thankfully, no side effects. However, we had a phone call from our gp today saying that the latest advice from HPA is that they are not counting separate jabs as an appropriate dose and therefore we need to bring them in for a second booster!! Talk about moving the goalposts! We are undecided what to do - can find nothing to back this up on the net and are extremely frustrated. Help ......