Inclusion Criteria:  PLHIV enrolled in HIV care  Inclusion criteria:  Have HIV infection and currently in follow-up care at selected Health Facilities (HFs); Aged 18 years or older; Able and willing to give informed consent; Willing to test for exposure to SARS-CoV-2 or COVID-19 infection; Willing to be followed and to comply with study visits during the maximum of 15-month study period; Does not intend to move from their residence during the study period; Willing and able to provide contact information. HCWs offering HIV services  Inclusion criteria:  HCWs (medical doctor, medical officer, general nurse, maternal and child health nurse, pharmacist, laboratory worker, counselor, ancillary worker [e.g., archivist, receptionist], and cough officer) who are employed full-time and offering HIV services at selected HFs; Aged 18 years or above; Able and willing to give informed consent; Willing to test for exposure to SARS-CoV-2/ COVID-19 infection; Willing to be followed and available during the maximum of 15-month study period; ● Does not intend to transfer to another HF during the study period; Willing and able to provide contact information.  Exclusion Criteria:  PLHIV enrolled in HIV care  ● Any clinical or mental condition that, in the investigator's opinion, would preclude provision of informed consent or make study participation unsafe or unethical;  Any Differentiated Service Delivery where patients have an ART pick-up scheduled less frequently than four times a year (e.g. Community Adherence Support Group member); Patients whose antiretroviral (ARV) drugs are picked up by a confidant during their scheduled appointment.  HCWs offering HIV services  Any clinical or mental conditions that, in the opinion of the investigator or designee, would preclude provision of informed consent or make study participation unsafe or unethical; Individuals working in the HF but from the following cadres: drivers, security personnel, and community health workers/volunteers.