Lawrie McFarlane: Study warns of spread of cancer virus

A new study by the U.S. National Center for Health Statistics should concern every parent with teenage children. The authors found that nearly half of all American males age 18 to 59 were infected with human papillomavirus. Forty per cent of females in the same age group had the virus.

Worse still, half of both sexes were infected with high-risk strains that cause about 31,000 cases of cancer each year in the U.S. (Roughly 40 strains of the virus have so far been identified.)

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