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(A) Age-specific proportion of confirmed measles cases by epidemiological week, and (B) histogram of confirmed cases (N = 14 010) by epidemiological week—Mongolia, March 1–September 30, 2015. Note: During May 15–June 5, 2015, a nationwide outbreak response immunization (ORI) campaign was implemented using measles-containing vaccine with a target age group of 6–71 months, 371 971 doses were delivered, and the ORI administrative coverage was 94%.
