STI Statistics

Did you know…

  • 1 in 4 sexually active adolescent females have an STI1
  • In the U.S., more than 1.2 million people have HIV, and 14% are unaware of their infection2
  • Compared with older adults, sexually active adolescents aged 15–19 years and young adults aged 20–24 years are at higher risk of acquiring STIs3
  • Americans ages 15-24 make up just 27% of the sexually active population but account for 50% of the 20M new STIs in the U.S. each year4
  • Consequences of STIs are particularly severe for young women. Undiagnosed STIs cause 24,000 women to become infertile each year.
  • The majority of STIs are present without symptoms5
  • STI screening is critical: If you are sexually active, be sure to talk to your healthcare provider about STI testing and which tests may be right for you.6
  • Undiagnosed STIs cause 24,000 women to become infertile each year4
  • Men who have sex with men should be tested annually for syphilis, chlamydia, and gonorrhea7
  • All sexually active women younger than 25 should be tested annually for chlamydia and gonorrhea7
  • These three steps can protect young people from STIs: 1) get tested, 2) reduce risk behaviors, 3) get vaccinated against HPV4
  • Human papillomavirus (HPV) is the most common sexually transmitted infection in the United States. Some health effects caused by HPV can be prevented with vaccines.5
  • Safe and highly effective vaccines are available for 2 STIs: hepatitis B and human papillomavirus (HPV).8

Young people can protect themseves from STIs. Get Tested. Reduce Risk Behaviors. Get Vaccinated Against HPV.


  1. (pg. 58)
Sexual Health Sexually Transmitted Infections (STIs) Contraception