PMC

Respiratory infections and/or fever/influenza-like illness (RESP/ILI) emergency department (ED) visit volume compared with specific viral isolates for all age classes, not including pandemic H1N1. RSV Respiratory syncytial virus

Respiratory infections and/or fever/influenza-like illness (RESP/ILI) emergency department (ED) visit volume compared with specific viral isolates for all age classes including pandemic H1N1 (pH1N1). RSV Respiratory syncytial virus

Time series lag analysis of respiratory infections and/or fever/influenza-like illness emergency department (ED) visits compared with laboratory reporting of influenza A and pandemic H1N1 (pH1N1) specimen confirmation. The red horizontal lines represent the 95% CIs for a lack of trend (0.145). Values above or below these lines represent time-lagged trends. Only pH1N1 showed negative cross correlation values greater than the CIs. This may be due to large fluctuation in ED and laboratory data due to the pandemic levels; as such, only the pH1N1 cross-correlation values that were much greater than the CIs during lags of 0 and 1 will be used for discussion. A cross-correlation function greater than the CI indicates a probable connection between the timing of ED visits and laboratory case reporting. A lag of 0 indicates that the laboratory virus case reporting increase lagged the ED visit volume increase by up to one week. A lag of 1 indicates the laboratory virus case reporting increase lagged the ED visits increase by up to two weeks