A Yellow Fever vaccination certificate is required for all travellers 1 year of age and older coming from, or in transit for more than 12 hours in an airport in, Brazil, the Democratic Republic of the Congo, and Uganda.
The vaccination requirement is imposed by this country for protection against Yellow Fever since the principal mosquito vector Aedes aegypti is present in its territory.
For your protection, Yellow Fever vaccination is recommended for all travellers 9 months of age and older travelling at altitudes below 2300 m / 7546 ft in the Amazonian provinces of Orellana, Morona-Santiago, Napo, Pastaza, Sucumbios, and Zamora-Chinchipe.
Note: Vaccination is not recommended for the rest of the country. Take meticulous anti-mosquito bite measures during the daytime at altitudes below 2300 m / 7546 ft. Quito, Guayaquil, and the Galapagos Islands are risk free.
Countries may change their vaccination requirements without notice and in some instances border agents use their discretion to deny entry despite the officially stated requirements.
If there is risk of Yellow Fever at your destination, whether vaccination is required for entry or not, be prepared to show a certificate of vaccination or a waiver stating the medical reasons for not being vaccinated.