The 9-valent vaccine refers to the 9-valent HPV vaccine, which is generally not available at the age of 30, as the vaccine is available for the age group of 16 to 26 years. The 9-valent HPV vaccine is one of the types of HPV vaccines that can prevent HPV infections, and the vaccination can prevent more than 90% of cervical cancers and 90% of genital warts. The vaccination guidelines related to this vaccine suggest that women aged 16 to 26 years old are the suitable group for 9-valent HPV, while 30 years old is not in the dry age stage, so it is not suitable for vaccination, and it is recommended that the principle 2-valent or 4-valent. For 30-year-old people, due to their own already have a high likelihood of viral exposure infection history, and there is no evidence to prove that the 9-valent HPV vaccine can play a protective role for this age group of post-exposure people. Therefore, 9-valent HPV vaccine is not recommended at age 30. Individuals should receive the 9-valent HPV vaccine if they meet the indications for the vaccine. In addition, individuals should pay attention to observing the changes in their body after vaccination, and must seek medical attention if they experience any unusual and serious adverse reactions.