Clinical Trial of SARS-CoV-2 Vaccine (Vero Cells), Inactivated in Healthy Population Aged 3 to 17 Years(COVID-19)

2 doses of SARS-CoV-2 Vaccine (Vero Cells), Inactivated should be administered as an intramuscular injection into the lateral deltoid of the upper arm with a 28-day interval.

2 doses of Placebo should be administered as an intramuscular injection into the lateral deltoid of the upper arm with a 28-day interval.