Nine-valent vaccine also refers to the nine-valent human papillomavirus vaccine, the third shot can usually be delayed for two weeks, and the maximum delay can not exceed six months. The HPV vaccine is a preventive vaccine for women aged 16-26 years, and usually requires three doses, usually at least three months between the third and second dose, and all three doses should be completed within one year. If there is a delay, the third dose of HPV vaccine can be delayed by two weeks, but the maximum delay is not recommended to be more than six months, because too long a delay will have a significant impact on the effectiveness of the vaccine. The HPV vaccine is recommended to be administered in chronological order. You should also pay attention to the care after vaccination, such as resting more, not to be tired, and protecting the vaccination site to prevent infection. If you have any discomfort after vaccination, it is recommended that you go to the hospital in time.