We have just moved from S London, where the MMR jab is given at 12 months, with a booster at 15 months. My DS had the first MMR jab. On moving, (to rural Norfolk) my new practice nurse tells me that he is up to date, and does not need his second MMR until his pre-school jabs are due. Is this because London is considered more infectious? (same reason you get the BCG in London, and other urban areas, and not outside?) Grateful for your thoughts - don't want to make a mistake.