Of the ≈400 cases of human avian influenza (H7N9) infection diagnosed in China since 2003, the only travel-related cases were in Hong Kong and Taiwan, which have close geographic, economic, and cultural ties to China and extensive bidirectional travel. This case highlights the ease with which emerging viral infections can travel globally. On a map of recent air travel from China, major destinations identified (12) were Taiwan, Hong Kong, Malaysia, and Singapore; dozens of flights went to major cities in Europe and North America, which received hundreds of visitors directly from China weekly. In the first 3 quarters of 2013, an estimated 72.5 million tourists left China (13). To ensure accurate identification and appropriate management of emerging novel respiratory viral infections, clinicians in destination countries need to obtain detailed travel histories from tourists and returning travelers