The maximum age for cervical cancer vaccination is 45 years old, and do not inject cervical cancer vaccine until 50 years old, because at this time, if you inject cervical vaccine again, there may be more serious adverse reactions. 50 years old will not appear antibodies after vaccination, and older people will not react poorly to the vaccine and will not have immunity to human papilloma virus, so there is no need to use cervical cancer vaccine again. There are quadrivalent, bivalent and nine-valent cervical cancer vaccines. Bivalent cervical cancer vaccine is used for women aged 9-45, quadrivalent cervical cancer vaccine is used for women aged 20-45 and nine-valent cervical cancer vaccine is used for women aged 16-26, so you can choose the right vaccine for yourself according to your age group.