Figure 5: Estimated time to seroreversion and assay sensitivity by time and hospitalization status.

(A) Mean time to seroreversion for individuals tested on each assay, stratified by hospitalization status, with 95% confidence intervals derived from bootstrapping. Symbol (‡) indicates increasing antibody responses over time (95% confidence interval for time to seroreversion was negative and did not cross 0), and symbol (*) indicates antibody responses for which 95% confidence interval of time to seroreversion crossed 0. (B) Estimated sensitivity of each assay (showing posterior median estimates and 95% credible intervals), stratified by hospitalization status at 2 month intervals, from 0 months to 6 months after seroconversion. Seroconversion was assumed to occur (if at all) 21 days after symptom onset (if symptomatic) or 21 days after positive PCR test (if asymptomatic).