Health & Medicine

June 20, 2013 12:00 AM

HPV vaccine called big success

The prevalence of dangerous strains of the human papillomavirus – the most common sexually transmitted infection in the United States and a principal cause of cervical cancer – has dropped by half among teenage girls in recent years, a striking measure of success for a vaccine against the virus that was introduced only in 2006, federal health officials said on Wednesday.

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