AIDS disease TEST

AIDS was first reported in the United States in 1981 and has since become a major worldwide epidemic. AIDS is the most advanced stage of infection caused by HIV. The names HIV and AIDS can be confusing because both terms describe the same disease. But most people who are HIV positive do not have AIDS. An HIV-positive person is said to have AIDS when his or her immune system becomes so weak it can't fight off certain kinds of infections and cancers, such as PCP (a type of pneumonia) or KS (Kaposi sarcoma, a type of cancer that affects the skin and internal organs), wasting syndrome (involuntary weight loss), memory impairment, or tuberculosis.
Even without one of these infections, an HIV-positive person is diagnosed with AIDS if his or her immune system weakens, as indicated by the number of CD4 cells in his or her blood. A CD4 cell count less than 200 in an HIV-infected person gives someone a diagnosis of AIDS. It can take between 2 to 10 years, or longer, for an HIV-positive person to develop AIDS if he or she is not treated. Most people with HIV will not develop AIDS if they start treatment (with medicines called antiretroviral therapy or ART) soon after becoming infected.
Once a person has been diagnosed with AIDS, she or he is always considered to have AIDS, even if that person's CD4 count goes up again and/or they recover from the disease that defined their AIDS diagnosis.
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