Fig. 5.

Shown are pseudoviral neutralization test results of neutralizing antibodies against three virus strains by serum from recovered patients with different COVID-19 severity. (A–F) Convalescent serum neutralization analysis at 1 month and 12 months post-recovery. (A–C) Comparison of serum neutralizing antibody levels at different severity levels after the same recovery time. (D–E) Comparison of serum neutralizing antibody levels after different recovery times of the same severity. Statistics were calculated using Mann–Whitney two-sided U test and Kruskal–Wallis test with Dunn's multiple-testing correction.