Since the turn of the century, we have experienced increases in a variety of disease threats including bioterrorist attacks, pandemic influenza, emergence of novel diseases, and re‐emergence of known pathogens. Although every disease scenario had specific criteria surrounding its spread, a common factor in nearly all included travel. It is not a new concept that travel is in itself a vector for disease transmission and in some respects one of the most important factors, given our increasingly global society.
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