Bivalent protects you from HPV 16 and 18 which are responsible for cervical cancer in 70% of the patients
The quadrivalent vaccine protects you from HPV 16, 18, 6 and 11 which causes genital warts
Nonavalent vaccines protect you from HPV 16, 18, 6, 11, 31, 33, 45, 52, and 58 which account for 10-20% of cervical cancers
HPV vaccines can be taken from the age of 9 to 25 years after consultation with your doctor, and their dosage varies with age.
These vaccines work like other immunization processes and guard against viral infections by stimulating the body to produce antibodies which encounter HPV infections in the future by binding to the virus and preventing it from infecting healthy cells.
HPV vaccines do not prevent other sexually transmitted diseases and do not treat existing HPV infections or other HPV-related diseases.