1. Passenger Traffic;ACI (Airport Council International),2018
2. Airport exit and entry screening for Ebola--August-November 2014;Brown;MMWR (Morb. Mortal. Wkly. Rep.),2014
3. Air Passenger Travel Arrivals in the United States from Selected Foreign Countries;BTS (Bureau of Transportation Statistics),2018
4. Severe Acute Respiratory Syndrome-Singapore;CDC (Center for Disease Control),2003
5. The 2009 H1N1 Pandemic: Summary Highlights;CDC (Center for Disease Control),2010