Why the study?
Does nationwide routine immunization at 1 year of age prevent hepatitis A cases compared to regional vaccination at 2 years of age in the US population?
Does nationwide routine immunization at 1 year of age prevent hepatitis A cases compared to regional vaccination at 2 years of age in the US population?
Mathematical modeling supports universal hepatitis A immunization of 1-year-olds in the US to maximize herd protection and prevent cases.
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May support nationwide 1-year HAV immunization to reduce cases; leaves open prospective confirmation of modeled impact.
Effelterre et al. (2006) studied this question.
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