Yes, there is a risk of yellow fever in Colombia. "[Yellow Fever vaccinations are] Required if arriving from Angola, Brazil, Democratic Republic of the Congo, or Uganda and ?1 year of age and for travelers who have transited >12 hours in an airport located in a country with risk of YF virus transmission. Recommended for all travelers ?9 months of age except as mentioned below. Generally not recommended for travelers to the cities of Barranquilla, Cali, Cartagena, and Medellín (see map below). Not recommended for travelers whose itineraries are limited to all areas >2,300 m (7,546 ft) in elevation, the department of San Andrès y Providencia, and the capital city of Bogotá. Note: Yellow fever vaccine availability in the United States is currently limited. Travelers may need to schedule appointments well in advance and visit a clinic some distance away. Find the nearest clinic that has vaccine."