Emerging Infectious Disease ISSN: 1080-6059

Syndromic Surveillance in Public Health Practice, New York City

Richard Heffernan*, Farzad Mostashari*, Debjani Das*, Adam Karpati*, Martin Kulldorff†, and Don Weiss*

Author affiliations: *New York City Department of Health and Mental Hygiene, New York, New York, USA; and; †Harvard Medical School and Harvard Pilgrim Health Care, Boston, Massachusetts, USA

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Figure 1

Trends in emergency department visits for fever and respiratory syndromes, New York City, November 1, 2001–November 14, 2002. Plots show the daily ratio of syndrome visits to other (noninfectious disease) visits. diamonds, citywide signal; triangles, spatial signal by hospital; circles, spatial signal by patient’s home zip code; , influenza A; , influenza B isolates (weekly number identified in New York City residents by World Health Organization collaborating laboratories).

Figure 1. Trends in emergency department visits for fever and respiratory syndromes, New York City, November 1, 2001–November 14, 2002. Plots show the daily ratio of syndrome visits to other (noninfectious disease) visits. diamonds, citywide signal; triangles, spatial signal by hospital; circles, spatial signal by patient’s home zip code; , influenza A; , influenza B isolates (weekly number identified in New York City residents by World Health Organization collaborating laboratories).

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