ACHA Pandemic Influenza Surveillance
Influenza Like Illness (ILI) in Colleges and Universities

Weekly College Case Data

(Week Ending December 18, 2009)

The following depicts weekly ILI case data (CDC ILI case definition) [ICD-CM Diagnosis 487.1] reported to ACHA by institutions of higher education participating in this ACHA ILI surveillance network. Data reported are for the weekly period (Saturday through Friday), reported to ACHA as of the following Monday.

ACHA thanks all participating institutions involved in this surveillance effort. Together, our efforts should provide college health professionals and public health officials with a greater understanding of the pace and geography of newly emerging cases and better understand and manage response to the novel H1N1 flu pandemic.

Limitations: State case counts and rates do not represent the complete incidence of ILI in the state's population, nor the incidence of ILI among all institutions of higher education in the state. The case counts and rates only represent those institutions of higher education that participate in the surveillance program.

Suggested Citation: American College Health Association. American College Health Association Influenza Like Illnesses (ILI) Surveillance in Colleges and Universities Fall 2009: Weekly College ILI cases reported. Linthicum, MD: American College Health Association; 2009.


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The following supplemental ILI data provided by gender, age, and morbidity/mortality, reflect characteristics only from reporting institutions that collected and reported the data broken down by these categories. These data do not necessarily reflect the characteristics of ILI being reported by all participating institutions.

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