inclusion criteria: * healthy subjects of ≥ 18 years old. * the subject can understand and voluntarily sign the informed consent. * axillary temperature ≤37.0℃. * general good health as established by medical history and physical examination

inclusion criteria: * healthy subjects of ≥ 18 years old. * the subject can understand and voluntarily sign the informed consent. * axillary temperature ≤37.0℃. * general good health as established by medical history and physical examination

inclusion criteria: - healthy subjects of ≥ 18 years old. - the subject can understand and voluntarily sign the informed consent. - axillary temperature ≤37.0℃. - general good health as established by medical history and physical examination

inclusion criteria: - healthy subjects of ≥ 18 years old. - the subject can understand and voluntarily sign the informed consent. - axillary temperature ≤37.0℃. - general good health as established by medical history and physical examination