Like justamom (I don't like that name, because MOM is the hardest profession there is, and with no formal degree program, its amazing how many people are willing to accept the position
), mine insisted that I have myself vaccinated.
I'd have to say that the only side effect was a sore arm. Not as bad as a tetanus shot (tomboy that I was, I had my fair share), but you don't exactly feel like going to lift weights the next afternoon. Makes you feel better upstairs, though-one less thing to worry about. (and gets Mom off your case!)