Figure 1. Percentages of Participants With Neutralizing Antibody (nAb) Responses at 1 Month and 3 Months After the Second Vaccine Dose.

Neutralizing antibody responses were measured against 2019-nCoV (the original, nonvariant SARS-CoV-2) and the different variants of concern. Data are expressed as IC₅₀ (half maximal inhibitory concentration) dilutions. Negative (gray bars) indicates IC₅₀ titers <50 dilutions; positive (colored bars) indicates IC₅₀ titers >50 dilutions. Values are median (SE, denoted by whiskers).