If you’ve recently had sex, or you’re deciding whether to have sex, you’ve likely thought about sexually transmitted diseases. How common are they? What is the risk to women, and young people in particular? What’s the best way to prevent infection?
What Are the Most Common STDs?
The Centers for Disease Control keeps annual records on the so-called “Big 3” STDs — chlamydia, gonorrhea, and syphilis.
Chlamydia was the most commonly reported STD in 2014, with more than 1.4 million cases. More than 350,000 cases of gonorrhea were reported, along with almost 20,000 cases of syphilis.
Chlamydia is a sexually transmitted infection caused by the bacterium Chlamydia trachomatis. According to the Centers for Disease Control, chlamydia is the most commonly reported bacterial STD in the United States.
Since 1994, it has represented the largest share of all STDs reported to the CDC. In 2013 alone, more than 1.4 million chlamydia infections were reported, but because chlamydia is often asymptomatic, it is estimated that the true number of infections is over 2.8 million. Sexually active women under the age of 25 are at especially high risk.