Hospitalized patientsPatients seeking emergency medical case, at the discretion of the treating clinicianPatient-facing healthcare workersStaff, volunteers, residents/inpatients, essential care providers, and visitors in hospitals and congregate living settings, including Long-Term Care, retirement homes, First Nation elder care lodges, group homes, shelters, hospices, temporary foreign worker settings, and correctional institutionsOutpatients for whom COVID-19 treatment is being considered (includes those 70 and older who have a risk factor including obesity (BMI >= 30), dialysis or stage 5 kidney disease (eGFR < 15 mL/min/173 m2), diabetes, cerebral palsy, intellectual disability of any severity, sickle cell disease, receiving active cancer treatment, solid organ or stem cell transplant recipients, or 50 and older if First Nations, Inuit, or Metis with any of those risk factors).People who are underhoused or homeless