Human Immunodeficiency Virus (HIV)
HIV is a virus that destroys the body's ability to fight off infection. People who have HIV may not look or feel sick for a long period of time after infection, but if not diagnosed early and treated, will eventually become very susceptible to many life-threatening diseases and to certain forms of cancer. Transmission of the virus most often occurs during sexual activity or by the sharing of needles used to inject intravenous drugs.
Learn more about HIV.
