HIV infection

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Antibodies	HIV	Kaposi's sarcoma - lesion on the foot	Kaposi's sarcoma - perianal
Primary HIV infection	tired woman

HIV infection is a viral infection caused by the human immunodeficiency virus (HIV) that gradually destroys the immune system, resulting in infections that are hard for the body to fight.

Human immunodeficiency virus infection

Acute HIV infection may be associated with symptoms resembling mononucleosis or the flu within 2 to 4 weeks of exposure. HIV seroconversion (converting from HIV negative to HIV positive) usually occurs within 3 months of exposure.

People who become infected with HIV may have no symptoms for up to 10 years, but they can still transmit the infection to others. Meanwhile, their immune system gradually weakens until they are diagnosed with AIDS. Acute HIV infection progresses over time to asymptomatic HIV infection and then to early symptomatic HIV infection and later, to AIDS (advanced HIV infection).

Most individuals infected with HIV will progress to AIDS if not treated. However, there is a tiny subset of patients who develop AIDS very slowly, or never at all. These patients are called long-term non-progressors.

HIV has spread throughout the United States. Higher concentrations of the disease are found in inner cities.

Related topics:

• Acute HIV infection
• Asymptomatic HIV infection
• Early symptomatic HIV infection
• AIDS

Review Date: 02/13/2006
Reviewed By: Monica Gandhi, M.D., M.P.H., Assistant Professor, Division of Infectious Diseases, UCSF, San Francisco, CA. Review provided by VeriMed Healthcare Network.