The quadrivalent vaccine, usually referred to as the HPV quadrivalent vaccine, is age-restricted and is generally appropriate for ages 9-45. The HPV vaccine is a vaccine that can prevent cervical cancer as well as genital warts, by preventing human papillomavirus infection and thus effectively preventing the occurrence of cervical cancer and other diseases. Currently, there are bivalent, quadrivalent and nine-valent HPV vaccines. 1. HPV bivalent vaccine is suitable for people aged 9 to 45 years old, and can prevent HPV-16 and HPV-18 virus infection. 2. HPV quadrivalent vaccine is suitable for people aged 9~45 years old and can prevent infection of four types of viruses: HPV-6, HPV-11, HPV-16 and HPV-18. 3. HPV 9-valent vaccine is suitable for people aged 16-26 years old, and can prevent infection of nine types of viruses: HPV-6, HPV-11, HPV-16, HPV-18, HPV-31, HPV-33, HPV-45, HPV-52 and HPV-58. It is recommended that people of the right age get vaccinated against HPV as early as possible.