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. 2017 Jun 9;66(22):584–589. doi: 10.15585/mmwr.mm6622e1

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The figure above is a flowchart showing the categorization of confirmed cases of legionellosis reported to the Supplemental Legionnaires’ Disease Surveillance System in 2015. — Categorization of confirmed cases of legionellosis*^,† reported to the Supplemental Legionnaires’ Disease Surveillance System, 2015

Abbreviations: CFR = case fatality rate; LD = Legionnaires’ disease; NNDSS = National Notifiable Diseases Surveillance System; SLDSS = Supplemental Legionnaires’ Disease Surveillance System.

* Legionellosis cases include Legionnaires’ disease and Pontiac fever, a mild influenza-like illness.

^† A total of 6,079 cases of legionellosis were reported to NNDSS in 2015.