Cervical cancer is one of the most common gynecological malignancies, and most of them are caused by persistent infection with high-risk HPV viruses, which have many types, but the only HPV types related to cervical cancer include 16, 18, 31, 33, 52, 58, 45, etc. Among them, 16 and 18 HPV infections are the main causes of cervical cancer, vulvar cancer, vaginal cancer and other malignancies. causes. Therefore, like influenza virus, cervical cancer is caused by virus, so cervical cancer vaccination can prevent the occurrence of cervical cancer. The best time for HPV vaccination is before the first sexual intercourse, because 80% of women who have sex are already infected with HPV virus, but it does not mean that those who have already had sex are not suitable for cervical cancer vaccination, for women who have already had sex, cervical cancer vaccination will also play a protective role. For women who are already sexually active and want to receive the cervical cancer vaccine, they must first undergo cervical cancer screening to rule out the possibility of existing cervical lesions. Before receiving the cervical cancer vaccine, in addition to ruling out existing cervical lesions, it is also important to ensure that you are healthy and free of immune deficiencies such as colds and fevers. The cervical cancer vaccine has not been found to have adverse effects on the fetus, but there is no data to support this, and vaccination during pregnancy and breastfeeding is not recommended. Will I not get cervical cancer after receiving the cervical cancer vaccine? Even the nine-valent cervical cancer vaccine does not cover all HPV conditions. In addition to the types outside the vaccine, persistent infection with other high-risk HPV types can cause cervical cancer. Therefore, it does not mean that cervical cancer screening is not necessary for those who have received cervical cancer vaccine, but it is still recommended for women of childbearing age.