Most people should be getting childhood vaccine boosters at least every ten years for the rest of their lives, or so I was told by the clinic at the uni where I did my MA.

(Me, I have the superfreak grade of immune system--I got one unboosted measles and rubella vaccine when I started school in 1979 or so and as of my titre check four or five years ago, I still had *plenty* of antibodies. Which is good, because I also have vaccine reactions.)