Table 1 Matched odds ratio and vaccine effectiveness of CoronaVac against COVID-19 infection, May–June 2021
Control | Matched odds ratio (95%CI) | Vaccine effectiveness (95%CI) | |||
|---|---|---|---|---|---|
CoronaVac (two doses) | No vaccination | ||||
Cases | CoronaVac for at least 14 days | 2022 | 132 | 0.28 (95% CI 0.23–0.33) | 72% (95% CI 67–77%) |
No vaccination | 478 | 120 | |||