I had the MMR vaccine when I was a teenager- now mid 30s. I've been around (but not in close contact) someone who got measles recently. Do I need another MMR or does it last forever? NHS website says 'Virtually everyone (more than 99%) will be protected against measles and rubella for more than 20 years after 2 doses of MMR.' Not overly worried and have no symptoms but just being cautious as I'm pregnant. Rang 111 but they just read me what was on the NHS website.