I went in to get a vaccine for foreign travel (~6 years ago) and the nurse suggested getting the MMR vaccine because of an additional vaccine in the mix. I had the MMR in school (90s) but it has been expanded, so it was a free shot

Now I'll tell you the story all about how My life got flipped-turned upside down And I'd like to take a minute Just sit right there I'll tell you how I became the prince of a town called Bel-Air