More bad news:

WASHINGTON (Reuters) -- Men should be vaccinated against a sexually transmitted wart virus to protect them against a type of mouth and throat cancer, U.S. researchers said Monday.

They said the rate of oropharyngeal cancers -- mostly cancers of the tonsil and base of tongue -- appears to be rising in certain populations and the human papilloma virus or HPV transmitted by oral sex is likely to blame.

New vaccines that target HPV may help turn the trend around, the researchers reported in this week's issue of the journal Cancer. The vaccines are recommended for young women in Europe and the United States.

There are several strains of HPV, which cause ordinary warts but also genital warts. These in turn can cause cancer in some cases. The researchers looked at various studies and concluded that HPV 16 was especially likely to be linked with certain cancers of the tonsil and base of tongue.

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