Which countries require a yellow fever vaccine?

Many countries require evidence of yellow fever vaccination prior to entry if you have recently travelled to one of the 47 countries where there is a high risk of yellow fever transmission.  This includes entry back into Australia.

The fact that a country has no requirement for yellow fever vaccination does not imply that there is no risk of yellow fever transmission. Travelers should check the Centres for Disease Prevention and Control website for the most up to date information on countries where yellow fever vaccine is recommended (wwwnc.cdc.gov/travel/yellowbook/2018/list/maps).