This publication was produced at the request of OCB, under the management of the Stockholm Evaluation Unit. It was prepared independently by Marcela Allheimen.

On February 8, 2017, eight months after WHO declared the end of Ebola virus transmission in the country, Guinean authorities declared an outbreak of measles. During the preparation phase, MSF decided to conduct an evaluation simultaneously with the rolling-out of the vaccination campaign. The objective of this real-time evaluation of the campaign concerned its appropriateness, timeliness, effectiveness, impact and coverage.