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Travelers play a key role in spreading many infections, including influenza. Such was the case with the spread of 2009 H1N1 influenza to Singapore, a major travel hub serving 37 million air passengers annually.
Before the 2009 H1N1 virus entered Singapore, public health officials implemented a containment plan, in which all passengers arriving at the international airport underwent thermal scanning, and all passengers with influenza-like illness (ILI) were referred to a designated screening center (Tan Tock Seng Hospital [TTSH]) for treatment and isolation. In this report, investigators described the first 116 patients hospitalized at TTSH with travel-associated H1N1 infection. By definition, all patients arrived in Singapore during the cont…