Direct and Spillover Effects of Middle School Vaccination Requirements
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We study the direct and spillover effects of state requirements that middle school youths obtain a tetanus, diphtheria, and pertussis (Tdap) booster prior to middle school entry. These mandates increased vaccine take-up by 29 percent and reduced pertussis (whooping cough) incidence in the population
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美国国家经济研究局创建时间：
2017-01-01
