Temporal profile and determinants of viral shedding and of viral clearance confirmation on nasopharyngeal swabs from SARS-CoV-2-positive subjects: a population-based prospective cohort study in Reggio Emilia, Italy.

Median time to viral clearance in this cohort was 30 days from the first positive swab and 36 days from symptom onset, with an increasing trend for increasing age and disease severity as assessed by ED access or hospitalisation ( table 2 ).

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