Understanding the most common sexually transmitted infections is the first step to protecting your health. Here is what you need to know.
The most commonly reported bacterial STI in the United States, with nearly 1.8 million cases reported annually.
A bacterial infection that can infect the genitals, rectum, and throat. Rates are rising fast, especially among young adults.
Human Immunodeficiency Virus attacks the immune system. Without treatment, it can lead to AIDS.
Caused by herpes simplex virus (HSV-1 or HSV-2). Extremely common -- more than half of Americans have HSV-1.
Human Papillomavirus is the most common STI. Nearly every sexually active person gets HPV at some point.
A bacterial infection that progresses in stages. Syphilis rates have been rising dramatically in recent years.
Caused by a parasite, "trich" is one of the most common curable STIs. About 3.7 million Americans are infected.
Most STIs are easily treatable when caught early. Left untreated, they can cause infertility, chronic pain, pregnancy complications, and other serious health problems. Because many STIs have no symptoms, testing is the only way to know your status.