AYA patients at the CU Buddy Clinic (for both quantitative and qualitative study)  Inclusion criteria  Aged 15-24 years of age Starting or currently receiving HIV treatment and prevention services, which includes any individual or combination receipt of the following services: ART, PrEP, HIV testing, receipt of condoms, HIV risk counselling Thai Nationality  Exclusion criteria  • Individuals with a history of, or are currently receiving, mental healthcare at the CU psychiatric clinic or elsewhere  Service providers at CU Buddy Clinic  Inclusion criteria  • Current staff providing care at the CU Buddy Clinic with any active patient interface, such as physicians, nurses, peer navigators, psychologists and psychiatrists  Exclusion criteria  Staff with less than 3 months duration of service at the CU Buddy Clinic Staff who are not affiliated with the CU Buddy Clinic