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  2. CDC classification system for HIV infection - Wikipedia

    en.wikipedia.org/wiki/CDC_Classification_System...

    Considerable variation exists in the relative risk of death following different AIDS defining clinical conditions. According to the US CDC definition, one has AIDS if he/she is infected with HIV and present with one of the following: A CD4+ T-cell count below 200 cells/μl (or a CD4+ T-cell percentage of total lymphocytes of less than 14%) OR

  3. Viral load monitoring for HIV - Wikipedia

    en.wikipedia.org/wiki/Viral_load_monitoring_for_HIV

    CD4 testing shows the strength of the immune system, but does not report viral activity. As established by the Centers for Disease Control and Prevention (CDC), a person with HIV and a CD4 count below 200 or a CD4 percentage below 14% is considered to have AIDS. [5] An increased CD4 count can result from an immune response to an infection or a ...

  4. Diagnosis of HIV/AIDS - Wikipedia

    en.wikipedia.org/wiki/Diagnosis_of_HIV/AIDS

    Declining CD4 T-cell counts are considered to be a marker of progression of HIV infection. A normal CD4 count can range from 500 cells/mm3 to 1000 cells/mm3. In HIV-positive people, AIDS is officially diagnosed when the count drops below 200 cells/μL or when certain opportunistic infections occur. This use of a CD4 count as an AIDS criterion ...

  5. AIDS-defining clinical condition - Wikipedia

    en.wikipedia.org/wiki/AIDS-defining_clinical...

    a CD4+ T-cell percentage of total lymphocytes of less than 14% or one of the defining illnesses. A patient presenting one of the above conditions but with laboratory evidence against HIV infection is not normally considered to have AIDS, but an AIDS diagnosis may be given if the patient has had Pneumocystis jirovecii pneumonia, and has not ...

  6. Signs and symptoms of HIV/AIDS - Wikipedia

    en.wikipedia.org/wiki/Signs_and_symptoms_of_HIV/AIDS

    The latency stage involves few or no symptoms and can last anywhere from two weeks to twenty years or more, depending on the individual. AIDS, the final stage of HIV infection, is defined by low CD4+ T cell counts (fewer than 200 per μL), various opportunistic infections, cancers, and other conditions.

  7. HIV/AIDS - Wikipedia

    en.wikipedia.org/wiki/HIV/AIDS

    A CD4 count of less than 200/μL [30] The U.S. Centers for Disease Control and Prevention also created a classification system for HIV, and updated it in 2008 and 2014. [115] [116] This system classifies HIV infections based on CD4 count and clinical symptoms, and describes the infection in five groups. [116]

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