Influenza pandemics are global epidemics caused by new flu viruses from animals, which adapt to allow sustained person-to-person spread. Person-to-person transmission of flu is most likely to occur through close exposure, putting all those in crowded situations, including travelers, at a high risk of infection. 

This document is a summary of the Pandemic Threats guidance for Save the Children staff regarding the risks of person-to-person respiratory transmission while traveling.