Relying on recent research by the World Health Organization, the Centers for Disease Control (CDC) have alerted travelers to new vaccination requirements for yellow fever. Nearly three dozen countries (see list below) have raised entrance requirements to include proof of vaccination for travelers who spend upwards of twelve hours in transit through countries with risk of yellow fever transmission. The CDC maintain a full list of yellow fever requirements and recommendations by country in the online 2012 Yellow Book.
New Yellow Fever Vaccination Requirements:
Africa:
Algeria
Botswana
Central African Republic
Lesotho
Malawi
Mauritius
Mayotte (France)
Senegal
Seychelles
South Africa
Asia:
Bhutan
Brunei
Burma (Myanmar)
Cambodia
China
Kyrgyzstan
Malaysia
Pakistan
Philippines
Russia
Singapore
Syria
Thailand
Europe:
Malta
North America:
Anguilla (UK)
The Bahamas
Barbados
Costa Rica
Dominica
El Salvador
Grenada
Honduras
Jamaica < Saint Kitts (Saint Christopher) and Nevis (UK)
Oceania:
Fiji
South America:
Easter Island (Chile)
This chart from the CDC shows the countries where a risk of yellow fever transmission is present.
