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Clinically confirmed (gray, n = 13 064) and laboratory-confirmed (black, n = 946) measles cases by week of rash onset—Mongolia, March 1–September 30, 2015 (N = 14 010). Note: During May 15–June 5, 2015 (indicated by dotted lines), a nationwide outbreak response immunization (ORI) campaign was implemented using measles vaccine with a target age group of 6–71 months, 371 971 doses were delivered, and the ORI administrative coverage was 94%.
