Test Details: HIV-1 is the most common type of Human Immunodeficiency Virus. This test detects the presence of HIV-1 in blood. This test is useful for: 1. Early detection of acute HIV-1 infection in children and adults who may be receiving combination antiretroviral prophylaxis or pre-emptive treatment. 2. Determining eradication of HIV-1 in individuals receiving combination highly active antiretroviral therapies. 3. Virologic detection of HIV-1 infection in infants younger than 2 years of age (an age group for which serologic tests are unreliable) born to HIV-1-infected mothers.