The HPV9 vaccine has been on the market for a short period of time and there is no clear confirmation of the duration of protection, which needs to be determined by subsequent trials. However, HPV2, HPV4 and HPV9 vaccines are all sterile vaccines, and the validity period of the vaccine varies with the injectable dose, regardless of the price of the vaccine, and is probably between 8 and 10 years. HPV9 vaccine can prevent not only 90% of cervical cancer and genital warts, but also 95% of anal cancer, and regular cervical cancer screening is also required after HPV9 vaccination. HPV vaccine cannot treat existing HPV infection, so HPV vaccination cannot provide lifelong immunity, and regular cervical cancer screening is still required after HPV vaccination to prevent the disease from occurring.