Inclusion Criteria:  Age 5-11 years  Exclusion Criteria:  Administration of COVID-19 vaccine>21 days prior to enrollment, Contraindication for COVID-19 vaccine such as, known hypersensitivity to a component of the vaccine or its excipients Congenital or acquired immunodeficiency (including recipient of systemic steroids ≥2 mg/kg or ≥20mg/day, within two weeks prior to enrollment)