Nine-valent vaccine usually refers to the nine-valent HPV (human papillomavirus) vaccine, which prevents nine subtypes of HPV infections, thus preventing diseases such as cervical cancer and condyloma acuminatum. The nine-valent HPV vaccine is designed to prevent the nine subtypes of human papillomavirus, or HPV, specifically including HPV6, 11, 16, 18, 31, 33, 45, 52, and 58, and is suitable for women aged 16-26, especially those who have not had sexual experience are most suitable. The nine-valent vaccine is good for preventing HPV infections of the nine subtypes mentioned above, and preventing warts and other diseases. In addition, because the two subtypes of HPV 16 and 18 have a close relationship between persistent infection and cervical cancer, vaccination with the nine-valent vaccine can, to a certain extent, reduce the incidence of cervical cancer. The HPV vaccine is administered in 3 doses over a period of 6 months, and it is not recommended to prepare for pregnancy during the vaccination period, as the vaccine is administered in good health. Persistent high-risk HPV infection is one of the risk factors for cervical cancer, and it does not necessarily mean that you will not develop cervical cancer after receiving the nine-valent vaccine. Regular cervical screening is recommended.