Saw a headline that the MMR vaccine may be reduced in effectiveness after 40-ish years. It's all breaking news since people being so backwards as to not be vaccinated in numbers to allow this kind of study to even materialize in a world that has a proven cure is certainly recent.
I know I had at least one shot as a baby/child/whenever it was appropriate in the 70's. Then the Air Force gave me the MMR vax before deploying in the '00s just for good measure. Much appreciated now.
You can ask to have your titers checked. I did mine about 5 years ago when it first started being reported that dipshits were doing their best to bring back measles and I was still well in the immune range but I'm glad I had it done. I had to tell my doctor I was traveling internationally to a country with lower vax rates (I was) to get him to agree, but I'd imagine doctors would be happy to check now.
If you were born before 1989 then you may have only been vaccinated a single time; a second dose takes the vaccine effectiveness from 93% to 97%.
So if you’ve don’t have access to your childhood vaccine records, then as other have suggested asking you doctor to run titers for measles is the best way to protect yourself.
Depends the year you were born and where, of you had the latest vaccine and with 2 doses then it supposed to provide 97% protection. Though it all really depends how is your immune system. If you have immune condition you might need a booster.