Measles Surveillance Data
Timely measles surveillance is critical to disease control. Identifying and confirming suspected measles cases through surveillance allows:
1) early detection of outbreaks,
2) analysis of on-going transmission in order to mount more effective vaccination measures, and
3) estimation of the underlying true measles incidence based on the patterns in reported data.
Most Member States submit monthly reports on suspected and confirmed measles cases identified through their national disease surveillance systems to WHO. In general, the number of reported cases of measles reflects a small proportion of the true number of cases occurring in the community. Many measles cases do not seek health care or, if diagnosed, are not reported. In addition, there is a one to two month lag time in reporting. For these reasons, the data provided on this page under-represents the true number of cases, particularly those occurring in the last one to two months.
Reported measles cases for last 6-month period
Map of reported confirmed measles cases for the last six months. Data is updated on a monthly basis and hence is subject to change.
Regional summary of reported measles cases
Number of suspected and confirmed measles cases by WHO region. Data is updated on a monthly basis and hence is subject to change.
Regional monthly distribution chart
Graph of the monthly case distribution by region. Data is updated on a monthly basis and hence is subject to change.