Data were extracted from the weekly Zimbabwe cholera epidemiological bulletins available in the World Health Organization's Zimbabwe cholera epidemiological bulletin archive (2) . The focus of the data collection was on the tables titled 'Distribution of Measles IgM Positive by Age group and District of residence', which typically contained both cumulative and new cases of IgM-confirmed measles cases by district and age categories. Although not entirely consistent, the age categories were younger than 9 months, 9Á11 months, 1Á4 years, 5Á14 years, and 14 years and older.