The Acquired Immune Deficiency Syndrome (AIDS) is caused by infection with the Human Immunodeficiency Virus (HIV).

Chlamydia trachomatis is a common cause of bacterial sexually transmitted infection.

Besides Aids, syphilis is the next most serious sexually transmitted disease. If left untreated, it will be fatal.

"Hepatitis" means that the liver is inflamed. This article discusses the different types of viral hepatitis.

It's the most common sexually transmitted infection, yet no one wants to talk about it. But someone does.