1.Age at the time of the first dose of vaccine: aged 18 to 59 years (including boundary values) in the adult group, >=60 years old in the older group, regardless of gender, 2.Axillary body temperature is less than 37.3 ? on the day of enrollment, 3.Based on the medical history and relevant physical examination and laboratory examination results, the investigator clinically determined that the patient was in good health, 4.Subjects have independent judgment ability, can read, understand and complete vaccination diary cards, and they participate voluntarily and sign an informed consent form.

1.Age at the time of the first dose of vaccine: aged 18 to 59 years (including boundary values) in the adult group, >=60 years old in the older group, regardless of gender, 2.Axillary body temperature is less than 37.3 ? on the day of enrollment, 3.Based on the medical history and relevant physical examination and laboratory examination results, the investigator clinically determined that the patient was in good health, 4.Subjects have independent judgment ability, can read, understand and complete vaccination diary cards, and they participate voluntarily and sign an informed consent form.

1. Age at the time of the first dose of vaccination: the adult group is 18-59 years old (including the boundary value), the elderly group >=60 years old, 2. Those whose axillary body temperature is less than 37.3 degree C on the day of enrollment, 3. Based on the medical history and relevant physical examination and laboratory examination results, the investigator clinically judges those who are healthy, 4. Subjects have independent judgment ability, can read, understand and complete vaccination diary cards, and they participate voluntarily and sign an informed consent form.

1. Age at the time of the first dose of vaccination: the adult group is 18-59 years old (including the boundary value), the elderly group >=60 years old, 2. Those whose axillary body temperature is less than 37.3 degree C on the day of enrollment, 3. Based on the medical history and relevant physical examination and laboratory examination results, the investigator clinically judges those who are healthy, 4. Subjects have independent judgment ability, can read, understand and complete vaccination diary cards, and they participate voluntarily and sign an informed consent form.