Description of measles D4-Hamburg outbreak in Hamburg, Germany, December 2008 to June 2009, which disproportionally affected a local Roma community Hegasy, G and Kätzner, K and Helle, M and Mankertz, A and Baumgarte, S and Wille, A and Fell, G, Eurosurveillance, 17, 20194 (2012), https://doi.org/10.2807/ese.17.24.20194-en