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. 2015 Feb 4;92(2):247–255. doi: 10.4269/ajtmh.14-0503

Figure 1.

Figure 1.

Reported incidence rate of Q fever cases per million persons per year. Cases were reported to the National Notifiable Disease Surveillance System, and the population at risk was calculated from the Census Bureau population estimates.32,33 Cases were reported as Q fever from 2000 to 2007 and as acute or chronic Q fever for 2008–2012.