when I was a kid I caught every bug doing the rounds (except German measles), and whatever you could get more than once, I got more than once. One term I was at school for just 2 days, going down with one after another bug. So they took my tonsils out, and then I didn't catch another bug for about a decade, and hardly anything since. Looks like it was a good call!I have had measles like 4 times