Anyone know what the chance of being infected is if you've been exposed to someone with measles and had both measles vaccinations? As best as I can gather, the

Anyone know what the chance of being infected is if you've been exposed to someone with measles and had both measles vaccinations? As best as I can gather, the probability of being protected is 97%, but that seems to be a general probability during the average persons lifetime. I can't seem to find a number for when its known you've been exposed.