On the topic of vaccines, if you were vaccinated against measles before it switched to the two-dose schedule (1989 in the US), you might want to have your titers measured.

I was vaccinated in the early 70s when it was a single dose. With measles in the news recently, I asked my doc to add a measles antibodies test to my blood draw. Came back negative. No immunity. I went to the local pharmacy and got an MMR booster the next day.

https://www.health.harvard.edu/diseases-and-conditions/some-...