The nine-valent cervical cancer vaccine is a vaccine against nine types of HPV infections: HPV 6, 11, 16, 18, 31, 33, 45, 52 and 58. The nine-valent vaccine is suitable for women of childbearing age between 16 and 26 years old, and it is best for women to receive the nine-valent vaccine before they start having sex to prevent 90% of cervical cancer from occurring. In addition, it can also prevent various kinds of acromegaly caused by low-risk HPV infection, so the earlier the vaccination for this type of vaccine, the longer the benefit will be. If you are over 45 years old, you are not very sexually active and the chance of HPV infection is greatly reduced, so the benefit time is also shortened, so this type of vaccine is no longer recommended. This type of vaccine also requires 3 injections and a total vaccination period of 6 months.