Limitations of infl uenza screening include the high proportion of asymptomatic infected travelers (5), incubation of infections acquired before or during a fl ight (3), reliance on self-identifi cation, limitations of case defi nitions, and limitations of thermal scanning (6) . Modeling data have shown that the ability of border screening to delay global pandemic infl uenza is closely linked to the effectiveness of the screening process or travel restriction used. To delay infl uenza spread by 1.5 weeks, border restrictions need to reduce imported infections by 90% (7) . The entry screening program we describe does not meet these standards.