Women who have been infected with HPV can be vaccinated. There are more than 100 types of HPV, which can be classified as high-risk, intermediate-risk and low-risk according to their risk to human body. Long-term, persistent high-risk HPV infections are likely to cause cervical cancer, with more than 70% of cervical cancer patients associated with HPV types 16 and 18, and low-risk HPV infections are likely to cause benign diseases such as genital warts. The HPV vaccine has an efficiency of over 90% in preventing cervical cancer and other related diseases. Currently, there are 2-valent, 4-valent and 9-valent cervical cancer vaccines on the market, with the 2-valent vaccine preventing diseases related to HPV types 16 and 18, the 4-valent vaccine preventing lesions related to HPV types 6, 11, 16 and 18, and the 9-valent vaccine having 31, 33, 45, 52 and 58 more types than the 4-valent vaccine . Most HPV infections are temporary and transient, and the HPV vaccine will be less effective against previously infected HPV types, but will still be protective against uninfected HPV types, so women with previous HPV infections can still get the vaccine. In addition, the vaccine is not a safe bet, and regular screening is still required regardless of the type of vaccine received.