Travelers who have visited Brasil, the Democratic Republic of Congo or Uganda are required an international certificate of vaccination against yellow fever. For all other travelers, there is no mandatory vaccination to enter Ecuador. However, it is recommended to have a yellow fever vaccination if you plan to travel to the Amazon region.
The following vaccinations are recommended for all travelers: diphtheria, tetanus, poliomyelitis, measles and Hepatitis A. And in some specific cases: Hepatitis B, abdominal typhus and rabies.
There is a small risk of Malaria below 1500 m to the East of the Andes and in the provinces of Esmeraldas and Carchi. If you plan to travel to these areas, it is recommended to bring Malaria emergency medication. Malaria does not exist in the Andes (Quito, Cuenca), Guayaquil and the Galapagos Islands.