1. Garske T Van Kerkhove MD Yactayo S . Yellow fever burden estimation [Internet]. 2013. http://www.who.int/csr/disease/yellowfev/YellowFeverBurdenEstimation_Summary2013.pdf?ua=1 (25 January 2016, date last accessed).
2. Prevention of Yellow Fever in Persons Traveling to the Tropics
3. Monath TP Gershman MD Staples JE Barrett ADT . Yellow Fever Vaccine. Vaccines. Philadelphia, PA: Elsevier Saunders; 2012.
4. SAGE Working Group. Background Paper on Yellow Fever Vaccines [Internet]. http://www.who.int/immunization/sage/meetings/2013/april/1_Background_Paper_Yellow_Fever_Vaccines.pdf (8 November 2014, date last accessed).
5. The World Bank. International tourism, number of arrivals [Internet]. 2013. http://data.worldbank.org/indicator/ST.INT.ARVL (15 December 2015, date last accessed).