Get your titers checked by your doctor, that’s about the only other thing you can do. Especially if you were born before 1989, since you may have only had 1 measles vaccine instead of 2, which raises the effectiveness.
If your titers are good and you’re masking then I don’t know of anything else to be done about it, since measles is airborne (even more so than COVID). Unless you’re immunocompromised those two things should protect you.
Can you clarify what you’re saying? Do you mean that your immune levels are low as an adult despite getting the MMR vaccine three times instead of two as a child?
It can happen! When a vaccine is 97% effective, that means for 3% of people who get it as directed, they still won’t have full immunity. A lot of the time it can be fixed with extra shots, since for some people (or even just with some vaccines) their bodies need a little extra ‘training’ before it works.
To corroborate with personal experience, I got a third round in 2019 for grad school, but post-vaccine blood test showed only a moderate increase in resistance to measles.
Doc said immunity to measles in particular can be resistant to training for many individuals and recommended postponing another booster unless traveling to a country where measles was a problem. Guessing he didn’t imagine that country might be the USA.
Since I live in a city with a lot of tourism from states with burgeoning measles epidemics, I’m getting my fourth booster in April. Oy vey.