A CD4 count is a laboratory test that measures the number of CD4 T-cells, which are a type of white blood cell that play a crucial role in the immune system. This test is primarily used to monitor the immune function in individuals with HIV and to assess the effectiveness of antiretroviral treatment. The normal range for CD4 count in healthy adults and teens is between 500 to 1500 cells per cubic millimeter of blood. For individuals with HIV, a CD4 count below 200 cells per cubic millimeter indicates a weakened immune system and a diagnosis of AIDS. Monitoring CD4 counts is important for assessing disease progression and the risk of opportunistic infections, as well as for determining the need for specific treatments and the effectiveness of HIV management strategies
. The CD4 count is an important indicator of immune function, particularly in individuals living with HIV. It is used to monitor the immune system's health, assess the effectiveness of antiretroviral treatment, and determine the risk of opportunistic infections.
