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Incidence of M. pneumoniae pneumonia in Japan by prefecture reported by the NESID. The ranges of the number of cases in each prefecture (annual cases per sentinel) are shown in different colors. The figure is adapted from Infectious Agents Surveillance Report (IASR), 33 (10), 2012. http://www.nih.go.jp/niid/en/iasr-vol33-e/865-iasr/2738-tpc392.html.
