Table 2.
Titer of neutralizing activity against the SARS-CoV-2 Omicron variant in sera from individuals following infection with the ancestral virus or the Gamma variant.
| Infection | Variant | Median titer (interquartile range) |
|---|---|---|
| Ancestral | Ancestral | 1:240 (1:80, 1:640) |
| Gamma | 1:160 (1:80, 1:320) | |
| Omicron | 1:20 (1:20, 1:20)a | |
| Gamma | Gamma | 1:160 (1:40, 1:320) |
| Omicron | 1:20 (1:20, 1:20)a |
The neutralizing titer of antibody in sera from individuals infected with the ancestral or Gamma variant of SARS-Co-V2 were determined against the ancestral strain and the Gamma and Omicron variants.
a
p < 0.001 vs. other variants.