The difference between quadrivalent and bivalent lies in the different types of HPV viruses. Quadrivalent can prevent HPV 16, 18, 6 and 11, which are the four types of viral infections, while bivalent can only protect against 16 and 18 viral infections, so try to take quadrivalent when your condition permits.
Women between the ages of 30 and 40, according to the HPV vaccine instruction manual, can take both quadrivalent and bivalent. The quadrivalent vaccine protects against four types of viral infections, as opposed to the bivalent vaccine, which protects against two types of HPV, 6 and 11.
The occurrence of cervical cancer in our country is mainly related to HPV 16 and 18 infections, and it is better to find a quadrivalent vaccination, or a bivalent vaccination if the quadrivalent vaccine is not available.