From epidemiological viewpoint, it has been elucidated that cervical cancer is caused by something transmitted through sexual contact. At present, human papilloma virus, HPV, is thought to be one of the most important candidates, because 60-80% of invasive cancer as well as 30-50% of premalignant lesions of the cervix contain HPV, most of which is HPV-16 or 18. However, these HPVs are detected ...