Participants in this study will include adults who visit Brigham and Women's Hospital emergency department in Boston, Massachusetts. Participants will be randomly assigned to a counselor versus provider and will be asked to fill out a questionnaire while waiting in the emergency room. The questionnaire will be anonymous. Participants will then be offered an oral rapid HIV test. Test results will be available in about 20 minutes and will be provided to participants by either their assigned HIV counselor. Participants who test positive for HIV will be offered a more definitive blood test to confirm HIV infection. The blood test results will be available 2 weeks from testing, and participants must return to the hospital to get their test results. Participants who test positive for HIV will be offered counseling support and referral services by either their assigned HIV counselor or emergency department staff member. Follow-up care appointments will also be initiated at this time. For participants who test positive for HIV, the study will last about 6 months. There will be no follow-up visits for participants who do not test positive for HIV during their emergency room visit.