Fig. 5. Weekly ED visits for AE, rhinovirus infection, and influenza virus infection over 5 years. (A) Number of ED visits for AE and incidence of rhinovirus infection in school-age children. Cross-correlation analysis indicated a significant relationship (rho=0.331; P<0.010). (B) Number of ED visits for AE and incidence of influenza virus infection in the elderly. Cross-correlation analysis indicated a significant relationship (rho=0.682; P<0.010). ED, emergency department; AE, asthma exacerbation.