Immunogenicity
The immunogenicity results are shown in Primary immunogenicity analysis on Day 28 after booster doses of Omicron vaccine and CoronaVac, as well as after two initial doses of CoronaVac.Results are shown for the participants in PPS3. #: Estimated GMT value when comparing with Omicron vaccine group in 2C cohort. ¶: Estimated GMT value when comparing with Omicron vaccine group in 3C cohort. The positive cutoff value of the neutralizing antibody titer was 1:8. GMI, geometric mean increase. The bold values indicate the results of primary endpoints in this study.Comparing with the historical control group, not all pre-specified non-inferiority criteria were met (Detailed observed neutralizing antibody levels against Omicron BA.1, BA.5, Delta and ancestral strains are shown in Observed neutralizing antibody levels against Omicron BA.1 and BA.5 before and 28 days after booster doses of Omicron vaccine or CoronaVac in 2C cohort 