Emergency Department Visits for Influenza A(H1N1)pdm09, Davidson County, Tennessee, USA
Figure. . . Number of patients enrolled in the Influenza Vaccine Effectiveness study at Vanderbilt University (Nashville, Tennessee, USA) who had laboratory-confirmed influenza A(H1N1)pdm09 virus infection (bars) and number of emergency department (ED) visits associated with a discharge diagnosis of acute respiratory illness (ARI) or fever (line) among all residents of Davidson County, Tennessee, May 1, 2009–March 31, 2010.