U.S. states that require middle-school students to get tetanus/diphtheria or tetanus/diphtheria/acellular pertussis and meningococcal conjugate vaccines had higher immunization coverage, according to a study in the journal Pediatrics. Researchers assessed data from the 2008-2009 National Immunization Survey-Teen and found that education-only requirements about MenACWY or HPV did not boost immunization rates.

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