The second dose of the nine-valent cervical cancer vaccine is given 2 months apart from the first dose. Nine-valent cervical cancer vaccine is applicable to women aged 16~26 years old, and 3 doses of vaccination are generally recommended. The first dose of the nine-valent cervical cancer vaccine refers to the date of the first vaccination, and the second dose is given at an interval of 2 months from the first dose, and the third dose is given at an interval of 6 months from the first dose, so that the interval between the second dose of the nine-valent vaccine and the first dose is 2 months. In individual cases, the vaccination schedule of the vaccine does not need to be exactly in accordance with the stipulated time. Appropriate postponement of the vaccination is also allowed, but once the interval is too long, it may affect the production of protective antibodies. If vaccination is needed, it is recommended to take the vaccination on time under the guidance of a doctor.