My 12 year old got her shots last year. She didn't want to get it because there were 3 shots and not just one. Now she is done with all her shots and booster shots for awhile. I wasn't just worried about her having sex which I hope doesn't happen for many, many years. But there are so many nuts out there that something beyond her controll could happen. Then it could be too late for the shot to do any good.