Patients with higher and prolonged IgM antibodies are associated with more severe illness, poor recovery, and prolonged viral shedding (some patients may shed virus for more than 30 days).
Patients who respond weakly to IgG have higher viral clearance rate than strong responders.
There were no reports with direct information regarding infectiousness of patients.
Vanstone, J; Reeder, B; Duncan, V. What is the relationship between antibody development and viral shedding and infectiousness? 2020 May 19; Document no.: LAB041601v2 RR. In: COVID-19 Rapid Evidence Reviews [Internet]. SK: SK COVID Evidence Support Team, c2020. 5 p. (CEST rapid review report)