Sure do. I try to keep a full set of vaccinations on board and keep them up up to date. Even a few diseases which are not problems in the US. Things go south and that might change. Immunity, even partial immunity, beats even the best treatment.

Part of this is an age thing. When I was in school there were still a few kids around who were suffering the effects of polio. Most adults at the time had experience with polio stalking the summers like a deranged maniac. The polio vaccine was huge blessing that showed that medical science could do more than just stitch wounds and hold your hand while you died. Polio and smallpox showed that done well a disease could be driven off. Or even destroyed.

Fewer people vaccinated means there is an ever greater chance diseases we haven't seen for a couple of generations in the US could show up and spread rapidly.