The Study

influenza A(H7N9) virus infection in 2 travelers returning from China who sought outpatient care for typical influenza-like illness. There was no further spread, but serosurvey findings showed broad population susceptibility to H7N9 virus. Travel history and timely notification are critical to emerging pathogen detection and response. Since February 2013,>600 human cases of avian influ-enza A(H7N9) infection have been reported from east-ern China, where the virus is considered enzootic in poultry (1). Travel-associated cases have previously been reporte