Nine-valent generally refers to the nine-valent HPV vaccine, which needs to be completed before the age of 26 years old three shots. The nine-valent HPV vaccine applies to women aged 16-26 years old, who need to complete the three injections before the age of 26 years; if there is no sexual exposure that is, women who are not sexually active are the best, and the nine-valent vaccine is generally not an option for those over the age of 26 years old. Since there is no phase III clinical trial for the age group over 26 years old, the effectiveness and safety of applying the nine-valent HPV vaccine has not been verified, so the nine-valent HPV vaccine is not available for women over 26 years old in China. Women over the age of 26 can receive bivalent HPV vaccine or quadrivalent HPV vaccine. The bivalent HPV vaccine is suitable for women between the ages of 9-45 years old and can prevent HPV 16 and HPV 18 viruses. Quadrivalent HPV vaccine is suitable for women aged 9-45 years old and protects against HPV type 16, HPV type 18, HPV type 6 and HPV type 11 viruses. If women over the age of 26 want to get the HPV vaccine, it is recommended to inquire about the bivalent HPV vaccine or quadrivalent HPV vaccine at your local hospital.