The difference between the quadrivalent and nine-valent cervical cancer vaccines is mainly in the following three aspects: the first is the difference in price, the second is the difference in vaccine coverage, and the third is the difference in applicable age. 1. The difference in price, at present, there is only quadrivalent cervical cancer vaccine in China, one shot is about 800 yuan, and generally three shots are given, so the total of three shots is more than 2000 yuan. The nine-valent vaccine is not yet available in China, but can be booked online now. The price in Hong Kong is generally about 3,000-4,000 yuan. 2. The scope of coverage is different. The quadrivalent literally means that it only covers four HPV cervical cancer vaccines, including the four types 6, 11, 16 and 18, while the nine-valent adds five other high-risk HPV types in addition to the above-mentioned four types, which is more suitable for Asian cervical HPV infections, because the 16 and 18 types are relatively speaking not particularly common among Asians, but the 52 and 53 types are very easy to be infected by Asians. 3. The difference in the applicable age. The optimal age for the cervical cancer vaccine is 9-26 years old, and it is best not to have sex. The quadrivalent is also above 9 years old and can be relaxed to about 40 years old. The optimal age is also 9-26 years old, but if a woman is already in her forties and wants to get the vaccine, she can get the vaccine, but the effect of the vaccine will be relatively worse if she has sex, is infected with a virus or is not within the most suitable age range.