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vía Discover Magazine | rsslist el 5/01/12
Five years ago the Centers for Disease Control and Prevention controversially recommended that girls be vaccinated to prevent infection with human papilloma virus (HPV). Now the agency is extending the recommendation to boys ages 11 to 13, with a onetime "catch-up" injection suggested between ages 13 and 21. The vaccine protects against four common strains of the virus, considered the most common sexually transmitted disease in the United States. ...
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