Patients presenting to the UCSD ED with viral syndromes are approached by staff and asked to complete a questionnaire regarding possible recent HIV exposure. Patients with risk for recent HIV infection are offered participation in this study. Pre-test counseling includes a review of: (1) the risk of discrimination if the test is positive, (2) the implications of a positive test upon the health of the patient and that of their sexual or needle-use partners, and (3) the possibility that this test, like any laboratory test, could be wrong. Consenting patients have blood drawn for HIV RNA testing and for possible HIV p24 antigen confirmatory test. Blood is labeled with a unique identifying number and not by name. When results become available, patients go the UCSD Treatment Center to learn the results and for post-test counseling.