About HIV | HIV | CDC
HIV (human immunodeficiency virus) is a virus that attacks the body's immune system. Without treatment, it can lead to AIDS (acquired immunodeficiency syndrome). There is currently no effective cure. Once people get HIV, they have it for life. But proper medical care can control the virus.

HIV/AIDS - Symptoms and causes - Mayo Clinic
HIV makes the body less able to clear out infections and diseases. If HIV infection is not treated, over time it can cause an illness called acquired immunodeficiency syndrome (AIDS). HIV spreads through contact with some body fluids.

HIV and AIDS - World Health Organization (WHO)
WHO fact sheet on HIV and AIDS with key facts and information on signs and symptoms, transmission, risk factors, testing and counselling, prevention, treatment and WHO response.

What Are HIV and AIDS? - HIV.gov
HIV is a virus that can make it harder for your body to fight other infections and diseases. If HIV is left untreated, it can lead to AIDS, a late stage of infection that happens when the immune system is badly damaged by the virus.

HIV - Wikipedia
HIV/AIDS research includes all medical research that attempts to prevent, treat, or cure HIV/AIDS, as well as fundamental research about the nature of HIV as an infectious agent and AIDS as the disease caused by HIV.

HIV & AIDS: Causes, Symptoms, Treatment & Prevention
Human immunodeficiency virus (HIV) is the virus that causes AIDS. HIV slowly weakens your immune system until you are unable to fight off even minor illnesses.

HIV and AIDS: Symptoms, Causes, Treatments, and More
HIV damages the immune system. Without treatment, AIDS can develop. Learn all about HIV and AIDS, including symptoms, treatments, and life expectancy.

HIV and AIDS: The Basics | NIH - HIVinfo
Get basic information about HIV, including how it affects the body, how to know if you have HIV, and how to prevent or treat HIV.