Large measles outbreak introduced by asylum seekers and spread among the insufficiently vaccinated resident population, Berlin, October 2014 to August 2015 Werber, Dirk and Hoffmann, Alexandra and Santibanez, Sabine and Mankertz, Annette and Sagebiel, Daniel, Eurosurveillance, 22, 30599 (2017), https://doi.org/10.2807/1560-7917.ES.2017.22.34.30599