Given that cervical cancer screening (Pap tests) has greatly reduced the occurrence of the disease, why is the vaccine so important?
In addition to reducing the risk of cervical cancer, the vaccine will reduce the risk of precancerous changes to the cervix known as cervical intraepithelial neoplasia (CIN). High-grade CIN requires treatment follow-up, which causes anxiety and expense. The vaccine will also have a large impact in parts of the world where cervical cancer screening and follow-up are less available.