> Were you not vaccinated by choice, or it just isn't a big deal in Germany / Europe?

I have no idea how it works in Europe. But it could be a question of age. Measles was once so common that people over a certain age in the US are simply assumed to have had it at some point. That is, vaccinations aren't recommended for them because they are unnecessary.

Yes I am familar with this concept. I'm also vaccined, just apparently not against measles.

My parents certainly don't hold any strong feelings about it, so I guess it wasn't recommended at this point in time? I don't know.

In Germany it has been recommended for half a decade and the majority of kids get vaccinated. There are similar anti-vaxxing groups though, not out of fear of autism but rather prefering "natural" infections to build resistance in kids instead of "big pharma" vaccinations. There were some worrying but minor outbreaks last year if I remember correctly.