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In page Cervical cancer:

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These historical observations suggested that cervical cancer could be caused by a sexually transmitted agent. Initial research in the 1940s and 1950s attributed cervical cancer to smegma.[7] During the 1960s and 1970s it was suspected that infection with herpes simplex virus (HSV) was the cause of the disease. In summary, HSV was seen as a likely cause because it is known to survive in the female reproductive tract, and to be transmitted sexually in a way compatible with known risk factors, such as promiscuity and low socioeconomic status.[8] Herpes viruses were also implicated in other malignant diseases, including Burkitt's lymphoma, Nasopharyngeal carcinoma, Marek's disease and the Lucké renal adenocarcinoma. HSV was recovered from cervical tumour cells.[citation needed]