Proof of yellow fever vaccination should be required only if traveling from a country on the WHO list , unless otherwise specified. Individual country pages on fitfortravel will also indicate this requirement. The following maps show the approximate areas which have a risk of yellow fever transmission. Below the maps is a list of these countries. Countries listed in this table are not contained on the official WHO list of countries with risk of YFV transmission.
Therefore, proof of yellow fever vaccination should not be required if traveling from one of these countries to another country with a vaccination entry requirement (unless that country requires proof of yellow fever vaccination from all arriving travelers). The vaccine affords long term protection. Yellow Fever is a vaccine preventable disease. A traveler’s risk for acquiring YF is determined by various factors, including immunization status, location of travel, season, duration of exposure, occupational and recreational activities while traveling, and local rate of virus transmission at the time of travel. See full list on wwwnc.
Most people infected with YF virus likely do not seek medical attention because they have minimal or no symptoms. For people who develop symptomatic illness, the incubation period is typically 3–days.