inclusion criteria: - healthy residents aged 3 to 17 years at the time of consent - subjects and/or their guardian agree to sign the informed consent forms voluntarily. - be able to comply with study requirements/procedures. - axillary temperature ≤ 37.0℃

inclusion criteria: - healthy residents aged 3 to 17 years at the time of consent - subjects and/or their guardian agree to sign the informed consent forms voluntarily. - be able to comply with study requirements/procedures. - axillary temperature ≤ 37.0℃