Human papillomavirus (HPV) is the most common sexually transmitted infection in the United States. Some health effects caused by HPV can be prevented by the HPV vaccines. What is HPV? HPV is the most common sexually transmitted infection (STI). HPV is a different virus than HIV and HSV (herpes). 79 million...

Untreated sexually transmitted diseases (STDs) can cause pelvic inflammatory disease (PID), a serious condition, in women. 1 in 8 women with a history of PID experience difficulties getting pregnant. You can prevent PID if you know how to protect yourself. What is PID? Pelvic inflammatory disease is...