Contraindications to quadrivalent cervical cancer vaccine are as follows: 1) allergy to yeast and severe allergy to the vaccine; 2) lactating women who are preparing for pregnancy or are already pregnant; 3) recent use of certain immunosuppressive drugs, colds or unstable health conditions. Although the toxic side effects of cervical cancer vaccination are very mild and most of the population can be vaccinated, vaccination is not recommended for people with the above contraindications, and the quadrivalent cervical cancer vaccine is clinically recommended for healthy women aged 20-45.