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. 2012 Jul;18(7):1166–1169. doi: 10.3201/eid1807.120130

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Epidemic curve of a pertussis outbreak, September 2010–April 2011, Japan. A) Suspected cases of pertussis. B) Laboratory-confirmed cases of Bordetella pertussis and B. holmesii infection. *As of September 20–26, 2010.