I am a teenager or young adult, I'm not at risk for an STI, right?

Wrong. One out of every four teenagers and young adults will get an STI, even though many think they know how to protect themselves. There are other STIs out there besides HIV, and they are on the rise among young people. They include chlamydia, gonorrhea, syphilis, herpes and human papillomavirus (HPV), which cause genital warts and abnormal Pap smears.