Sexually Transmitted Diseases (STDs) are a serious health hazard today. There are over 20 known types falling into three categories (parasitic, bacterial, and viral), and major segments of our population are unaware of important information about their prevalence and consequences. For example, one out of five people in the United States has the Herpes Simplex Virus (HSV); and the Human Papilloma Virus (HPV) is linked to cancer of the cervix.

• Begin an interactive tutorial on STDs offered by MedlinePlus, a service of the National Library of Medicine.
• Browse an on-line bibliography of readings on STDs from MedlinePlus, a service of the National Library of Medicine