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Number of reported measles cases by month of onset of symptoms, amongst Rom/Sinti and Italian ethnic population, in the Lazio region, June 2006 - August 2007 (Total n = 449), and period of detection of different stereotypes. In the boxes the sequence of different stereotypes and clusters of common origin identified. The two cases reported among the Italian ethnic population in the first two weeks of June, and the six cases in July-August 2007, should be considered endemic cases.
