Characteristics of individuals with developing symptoms upon entry and identified as having Pandemic (H1N1) 2009 by enhanced surveillance afterwards (n = 24).

Notes: Cases 11 and 13 were detected with an infrared thermoscanner.Case 8 and 13, Dengue fever was suspected and a test for Dengue was performed.Case 22 had been negative on a rapid influenza diagnostic test performed in the U.S.*Days from arrival to onset are expressed as 0 for the day of arrival, as minus number of days for previous days, and as plus number of days for following days.**USA refers to mainland U.S.