I didn't want DS to have the MMR at the same time as the pneumo jab thing when we were offered it at a year old, and the HV told me the maternal immunity would be gone by 15mo so to make sure he was vaccinated by then. But I've since heard of people delaying it for several more months, and I'm tempted to do the same. DS is small for his age, and although he's in great health I'd rather give him as good a chance as possible of avoiding any side effects... Or am I barking up the wrong tree? Should I just get it over with now?