Shanghai Municipal Center for Disease Control and Prevention
With
China National Biotec Group Company Limited
Age
4–4
Sex
ALL
Healthy volunteers
Accepted
You may be eligible if
Aged 4 years old
With legal guardian signing the informed consent
Able to participate in all planned visits and comply with all research procedures (such as completing diary cards of adverse events and participating visits)
With clear vaccination records including no SARS-CoV-2 vaccine history, with 1 varicella vaccine and 2 measles-containing vaccines history
the last attenuated vaccine was administered ≥28 days ago, and other vaccines administered ≥14 days ago
With an axillary temperature ≤37.5℃ at the time of vaccination
You may not be if
With SARS-CoV-2 infection in the last 3 months (any of the following conditions shall be met: positive nucleic acid test; positive antigen test; suspected SARS-CoV-2 infection symptoms of subject or close contacts)
allergic to any substance of the vaccine or with a severe allergic reactions history of vaccines (such as acute allergic reactions, angioneurotic edema, breathing difficulties, etc.)
Suffering uncontrolled epilepsy or progressive nerve system diseases, or with a history of Gribali syndrome
With acute illness, severe or acute attack of chronic illness or fever
With immunodeficiency or weakened immune system or being treated with immunosuppressant drugs (oral steroids)
Received non specific immunoglobulin within 3 months
Occurrence of any serious adverse event that may be related to the previous dose of study vaccine
Occurrence of systemic adverse reactions or allergic reactions with a severity level ≥ 3 recognized by researchers after vaccination
Any situation that researchers thought that might influence the consequence of the clinical trial
