At entry and at every subsequent visit, participants are systematically evaluated for eligibility and willingness to enter ACTG (or other NIH-sponsored) HIV treatment protocols from a menu developed and updated by the Pediatric Adolescent Working Group of the ACTG. A survey of participant attitudes, behaviors, and beliefs is administered and updated semiannually. Participants attend clinic visits every 3 months and are followed for a minimum of 6 months, until the end of the study. They receive periodic physical exams, STD and gynecologic or genitourinary evaluations, HIV symptom assessment and related diagnoses, TB evaluation, and laboratory tests (hematology and immunology).