You can get a sexually transmitted infection (STI) if you have contact with someone's skin, mouth, penis, vagina or anus that has the infection. Half of all new sexually transmitted infections happen in people under age 25. Each year, 1 in 4 sexually active teens gets an STI and 1 in 2 teens will get an STI by the time they are 25. Now is the time to get educated and protect yourself.

Think you know everything? Think again!