Safety of an Inactivated SARS-CoV-2 Vaccine for Prevention of COVID-19 in Children and Adolescents

This study is a multi-center and open design, phase Ⅳ clinical trial in population aged 3~17 years . The experimental vaccine will be manufactured by Sinovac Research and Development Co.,Ltd.The study is planned to be carried out in 11 provinces from August 2021 to December 2022, including Liaoning, Heilongjiang, Anhui, Fujian, Jiangxi, Hubei, Guangxi, Chongqing, Guizhou, Yunnan and Gansu. Each province will serve as a research center, and each research center will select the corresponding research site.A total of 33000 subjects including patients with pre-existing will be enrolled with 3000 for each research center, including 600 subjects aged 3~5years，1200 subjects aged 6~11 years,1200 subjects aged 12~17 years.

And subjects will receive two doses of vaccine on day 0 and day 28.

Inclusion criteria

• Have not received any COVID-19 vaccine in the past or at least one dose of CoronaVac manufactured by Sinovac Research and Development Co.,Ltd;
• Population aged 3~17 years ;
• The subjects can understand and voluntarily sign the informed consent form and participate in the follow-up;

Exclusion criteria

• History of severe allergy to the vaccine such as acute allergic reaction,angioedema and dyspnea ;
• Severe neurological disease such as Myelitis transverse,Guillain-Barre Syndrome and demyelinating disorders;
• Acute disease,acute onset of chronic disease and severe chronic diseases.