ContextAll US states require proof of immunization for school entry. Exemptions are
generally offered for medical, religious, or philosophical reasons, but the health
consequences of claiming such exemptions are poorly documented. ObjectivesTo quantify
the risk of contracting measles among individuals claiming religious and/or philosophical
exemptions from immunization (exemptors) compared with vaccinated persons, and to
examine the risk that exemptors pose to the nonexempt population. Design, Setting, and …