Which of the following tests is used to monitor the progress of HIV disease?

The CD4 and viral load tests are essential for monitoring the progress of HIV disease. The CD4 test measures the count of CD4 T lymphocytes, which are critical in maintaining the immune system's function. A decrease in CD4 count indicates a progression of HIV and a weakening of the immune response, which can lead to opportunistic infections and other complications.

The viral load test quantifies the amount of HIV RNA in the blood. It helps assess how actively the virus is replicating. A higher viral load suggests a higher level of viral activity, which correlates with disease progression. Regular monitoring of these two tests allows healthcare providers to evaluate the effectiveness of antiretroviral therapy (ART) and make necessary adjustments to treatment plans.

While a complete blood count can provide some information about the overall health of the patient, it does not provide specific insights into the progression of HIV disease. The HIV antigen test is primarily used for initial diagnosis rather than ongoing monitoring. Liver function tests can indicate liver health, especially since HIV and some treatments can impact liver function but are not specific markers for HIV disease progression.