Figure 3. . . . Incidence of all cases (per million) and outbreaks of listeriosis, 1978–2008, United States. White bar sections indicate single-state outbreaks, gray bar sections indicate multisite outbreaks, and black line indicates incidence per million. Data were obtained from the Foodborne Diseases ActiveSurveillance Network (FoodNet) and the Foodborne Disease Outbreak Surveillance System. Data are as of June 2010.
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