Direct and indirect costs per episode of influenza-like illness (ILI) for influenza positive and negative cases, by medical setting and viral type among influenza positive cases, mean U.S. dollars (95%CI)a.

Note:aWe used an exchange rate of 1 USD for 6.3 RMB to convert RMB costs to U.S. dollars;bOthers include bed, nursing, air-condition fees, etc;cOthers include expenses of accommodation, toy, etc;dPeComparison among influenza positive cases by medical setting and viral type.