Same-Day Antiretroviral Therapy as a Behavioral Design Intervention to Reduce Stigma in Key Affected Populations

Inclusion Criteria: * Aim 1: HIV experts will be selected from National Societies of HIV experts according to the following criteria: 1) 18 years old or older; 2) Be an HIV expert, including those from NGOs providing HIV care, and international specialists; 3) Provide informed consent. * Aim 2: * NGT Focus Groups (FG) * Staff members 1. 18 years old or older. 2. Be a clinical staff member at Hospital Dos de Mayo or Patrucco Primary Health Center. 3. Provide informed consent. * PWH receiving HIV care 1. 18 years old or older. 2. Identify as member of a KAP. 3. Receive HIV care at Hospital Dos de Mayo or Patrucco Primary Health. 4. Provide informed consent. * PWH who dropped out of HIV care 1. 18 years old or older. 2. Identify as a member of a KAP. 3. Previously received HIV care at Hospital Dos de Mayo or Patrucco Primary Health but dropped out of care, as identified through patient registries. 4. Provide informed consent. * In-depth interviews * 1\) 18 years old or older. * 2\) Be the director of Hospital Dos de Mayo or Patrucco primary health center or the HIV director at the Ministry of Health * 3\) Provide informed consent * Aim 3: * Clinical Staff Dyadic Surveys * 1\) 18 years old or older. * 2\) Be an HIV provider at Hospital Dos de Mayo or Raul Patrucco Primary Health Center. * 3\) Provide HIV care to one of the 125 PWH * 4\) Provide informed consent. * Patient Dyadic Surveys * 1\) 18 years old or older. * 2\) Identify as a member of a KAP. * 3\) Be newly diagnosed with HIV and eligible for SD-ART based on clinical criteria identified from Aims 1 and 2. * 4\) Provide informed consent.