Some cases of mouth cancer could be caused by a virus contracted during oral sex, scientists have warned.
Writing in New Scientist magazine, US researchers said the human papilloma virus, which causes most cervical cancers, may also cause oral tumours.
Experts say heavy smoking or drinking causes most mouth cancers, but the HPV link could help explain why some young adults develop the rare disease.
But they stressed people did not need to alter their behaviour. Continue
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