AIDS / HIV Transmission Directory
HIV is transmitted when an infected person's bodily fluids enter another person's body. This primarily occurs through sex or drug use. It can also be passed from an infected mother to her baby during birth. Blood transfusions were, but not longer are, a risk for transmitting HIV. HIV damages the immune system and hinders the body's ability to fight infections. HIV becomes AIDS when a person's CD4 T-cell count is below 200, but many people can live long lives with HIV. Follow the links below to find WebMD's comprehensive coverage about how HIV and AIDS are transmitted, how to prevent transmission, and much more.
More people with HIV are living longer than in the past. Read how HIV affects aging and how to plan for getting older if you have HIV.
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