Sexually transmitted infections (STIs) affect people of all ages, backgrounds, and from all walks of life. In the U.S. alone there are nearly 20 million new cases each year, about half of which occur among young people ages 15-24 years.

Getting the facts about STIs and sexual health is increasingly important. The videos below give you a brief introduction to STIs and the importance of getting tested. Also on this channel is a classic public service announcement from ASHA—VD is for Everybody—that dates back to the 1970s.

Going Further

Sexually transmitted infections (STIs): Getting the facts about STIs and sexual health is important. Learn more about STIs, tips for reducing risk, and ways to talk with healthcare providers and partners.

Chlamydia: Chlamydia is common—nearly three million infections in the U.S. each year. Chlamydia is often a “silent” infection: about 75% of women and 50% of men don’t have symptoms and don’t know they are infected. And undetected, untreated chlamydia can lead to serious health problems. For example, untreated chlamydia infections in women may lead to pelvic inflammatory disease (PID), a serious infection of a woman’s reproductive organs, which in turn can cause infertility. Learn more about chlamydia, how it is transmitted, and how you can prevent infection.

STI Testing: Anyone who is sexually active can contract an STI. Even if you only have one sexual partner, you can get an STI. Many STIs have no signs or symptoms in the majority of people infected, or they only have mild signs that can be easily overlooked. Left undiagnosed and untreated, some STI can lead to further health problems. So if you are sexually active, it’s important to learn more about STI testing and what tests are recommended for you.