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. 2005 Apr;11(4):579–583. doi: 10.3201/eid1104.040845

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Daily incidence of acute respiratory illness (ARI) cases at base infirmary, by case definition. Shaded segment of bar indicates ARI cases that met the definition of influenzalike illness (ILI) (temperature >37.8°C). Nonshaded segment indicates ARI cases that did not meet the ILI criterion (non-ILI). Arrows: A) vaccination campaign initiation, B) vaccination campaign termination, C) day 14 after campaign initiation.