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Keywords:

  • Adults;
  • children;
  • emergency department;
  • epidemic;
  • influenza A (H1/N1)

Surveillance of incident influenza-like illness (ILI) was implemented in two children and adult medical emergency departments during the influenza A (H1/N1) pandemic to assess correlations in the daily number of ILI-related emergency room visits (ERV) between these departments. A total of 7165 ILIs in children and 610 ILIs in adults were observed. We noticed a high linear correlation between the number of ERV involving ILI on day D in the pediatric department and the number of ERV because of ILI 2 days later in adults (R = 0·82, < 10−4). Therefore, the rate of adult ILI-related ERV might be anticipated based on the rate of pediatric ERV.