Specifications include, but are not limited to: Population Centered Health Homes (PCHH) will provide comprehensive clinical and essential support services for persons living with and vulnerable to HIV to promote ARV use for HIV PrEP and HIV treatment. PCHH will be responsible for providing, directly or through partnership, services in the following categories: Outreach and recruitment 4 th generation HIV screening (point-of-care and/or laboratory-based) Engagement/retention in healthcare Linkage to HIV-related medical care for newly diagnosed persons living with HIV Linkage to PrEP for persons vulnerable to HIV infection Primary care and/or HIV-related medical care Re-engagement in healthcare for persons previously diagnosed with HIV Medication adherence