Do adults need a #measles #MMR booster? An epidemiologist explains who is immune
"There are two special circumstances where the previous recommendations may not hold.
First, if you were vaccinated between 1963 and 1967, one of the measles vaccines available at the time consisted of just proteins from the virus rather than a live, weakened version of it. Researchers soon realized this inactivated, or “killed,” vaccine was less effective and didn’t provide long-term immunity. Unless you know for certain you received the live vaccine, physicians and public health experts recommend that people vaccinated during those years get one dose of the live vaccine at some point.
Second, if you fall into a high-risk group – for example, if you are a health care provider, are traveling internationally or attending college, physicians and public health experts generally recommend getting a second dose if you have only had one."
https://www.pbs.org/newshour/health/do-adults-need-a-measles-booster-an-epidemiologist-explains-who-is-immune