Hepatitis is is an inflammation of the liver almost always caused by different hepatitis viruses. Hepatitis B is the type most often sexually transmitted. Worldwide, more than 350 million people have Hepatitis B.
About one in five people in the United States over age 12 -- approximately 45 million individuals -- are infected with HSV-II, the virus that causes genital herpes. Around 50 - 80% of the adult population has oral herpes, which most people contract through nonsexual contact in childhood.
HIV is a virus that destroys the immune system and thus weakens the body's ability to fight disease and infection, even common infections like flus and colds. HIV usually progresses to AIDS. This makes HIV the most dangerous sexually transmitted infection today. It is the fifth leading cause of death for the young under 40 in the United States. At this time, no one has been cured of HIV or AIDS.