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Table 1 Mean number of daily cases in the non-flu seasons for hospitals S, M, and L by unspecified infection and gastrointestinal symptoms.

From: Early detection of influenza outbreaks using the DC Department of Health's syndromic surveillance system

 

Hospital S

Hospital M

Hospital L

Unspecified Infection

3.5

4.8

28.1

Gastrointestinal

9.0

21.9

14.7