First occurrence of COVID-19 at least 14 days after the second vaccination;Incidence of AEs and Serious AEs (SAEs) after each vaccination;Incidence of SAE, and Adverse events of special interest (AESIs), which relevant to COVID-19 including possible vaccine-enhanced disease;Incidence of severe solicited adverse events (AEs)

First occurrence of COVID-19 at least 14 days after the second vaccination;Incidence of AEs and Serious AEs (SAEs) after each vaccination;Incidence of SAE, and Adverse events of special interest (AESIs), which relevant to COVID-19 including possible vaccine-enhanced disease;Incidence of severe solicited adverse events (AEs)