inclusion criteria: - one or more symptoms of covid-19 illness and laboratory-confirmed sars-cov-2 infection - has at least one study defined risk factor for severe covid-19 illness - clinical team deems stable for outpatient management without supplemental oxygen - cp available at the site at the time of enrollment - duration of symptoms ≤ 7 days at ed presentation - informed consent from subject

inclusion criteria: - one or more symptoms of covid-19 illness and laboratory-confirmed sars-cov-2 infection - has at least one study defined risk factor for severe covid-19 illness - clinical team deems stable for outpatient management without supplemental oxygen - cp available at the site at the time of enrollment - duration of symptoms ≤ 7 days at ed presentation - informed consent from subject