@elkwisdom @overholt they did the same when I went to college in the early 90s, so I think I had an "extra" beyond what was standard at the time (meaning 3 total) but yet I still had no immunity when I tested a few months ago. It's worth testing again to check.

@overholt I'm fifty, and came to the same conclusion. I tested my titers and had zero immunity to measles, despite having decent immunity for rubella. So another booster was in order.