This is the first evidence of how well the HPV vaccine works since it came on the market seven years ago.
For girls ages 14 to 19, the study found a 56 percent reduction in the types of HPV virus targeted by the shots. Vaccination campaigns focus on girls ages 11 and 12.
Many men and women are infected with the human papillomavirus during their life. Most don't develop symptoms and clear the infection on their own. But some infections lead to genital warts, cervical cancer and other cancers.
Results of the study by the Centers for Disease Control and Prevention were released Wednesday.
More Nation & World Headlines
South Carolina Senate pushes forward with removing Confederate flag San Francisco shooting death inflames debate over illegal immigration Hundreds of thousands gather for pope Mass in South America POW-MIA chief to push for private-group aid to find war dead There’s good news for well-off homeowners in the GOP presidential campaign Jellyfish have become nature’s ultimate guerrilla protesters against power plants Mozambique destroys ivory, rhino horn in anti-poaching move Vomiting bug from Asia threatens global wave of gastro outbreaks
Our new comment system is not supported in IE 7. Please upgrade your browser here.