Past communicable diseases, such as the recent Ebola epidemic, have resulted in many deaths and highlight the potential economic cost of disruptions to air travel and the U.S. and global economies. This book examines the extent to which selected U.S. airports and airlines have plans for responding to communicable disease threats from abroad and to which a national aviation-preparedness plan guides preparedness; and the challenges that U.S. airports and airlines have faced when responding to threats and any actions taken to address them.