The Wyoming Department of Health Immunization Unit in compliance with Wyo. Stat. Ann. § 21-4-309, requires school administrators to complete an audit of the immunization status of students enrolled in public and private schools. The Wyoming Department of Health (WDH) administers this assessment each year. The aggregate results are reported to the Centers for Disease Control and Prevention (CDC) for publication in the Mortality and Morbidity Weekly Report (MMWR).