Progression of asymptomatic or mild-moderate COVID19 to severe disease; as defined by:• oxygen saturation < 94% and • needing any one of the following three treatment escalation steps; o initiation of supplemental O2 o initiation of intravenous/oral dexamethasone o having to transfer to a higher-tier healthcare facilityNumber of patients progressing to severe disease will be compared in the two groups. Number needed to treat will be calculated using relative risk reduction. [14 days from initiation of intervention]

Progression of asymptomatic or mild-moderate COVID19 to severe disease; as defined by:• oxygen saturation < 94% and • needing any one of the following three treatment escalation steps; o initiation of supplemental O2 o initiation of intravenous/oral dexamethasone o having to transfer to a higher-tier healthcare facilityNumber of patients progressing to severe disease will be compared in the two groups. Number needed to treat will be calculated using relative risk reduction. [14 days from initiation of intervention]