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Volume 13, Number 2—February 2007

Research

Code-based Syndromic Surveillance for Influenzalike Illness by International Classification of Diseases, Ninth Revision

Nicola Marsden-Haug*1, Virginia B. Foster*, Philip L. Gould†, Eugene Elbert*2, Hailiang Wang*, and Julie A. Pavlin*3Comments to Author 
Author affiliations: *Walter Reed Army Institute of Research, Silver Spring, Maryland, USA; †Air Force Institute for Operational Health, Brooks City Base, Texas, USA;

Main Article

Table 3

Data showing match of Air Force respiratory virus specimens to ICD-9 coded visits, January 2002–July 2003*

No. visits/typeNo. specimens
2 visits recorded (n = 321)
Both non-ILI90
1 ILI; 1 non-ILI164
Both ILI67
3 visits recorded (n = 12)
3 non-ILI6
1 ILI; 2 non-ILI5
2 ILI; 1 non-ILI1
4 visits recorded (n = 1)
1 ILI; 3 non-ILI1

*ICD-9, International Classification of Diseases, Ninth Revision; ILI, influenza-like illness.
†No. specimens obtained by day of matching visit.

Main Article

1Current affiliation: Tacoma–Pierce County Health Department, Tacoma, Washington, USA

2Current affiliation: US Census Bureau, Suitland, Maryland, USA

3Current affiliation: Uniformed Services University of the Health Sciences, Bethesda, Maryland, USA

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