Community transmission of influenza A (H1N1)v virus at a rock festival in Belgium, 2-5 July 2009 Gutiérrez, I and Litzroth, A and Hammadi, S and Van Oyen, H and Gérard, C and Robesyn, E and Bots, J and Faidherbe, M T and Wuillaume, F, Eurosurveillance, 14, 19294 (2009), https://doi.org/10.2807/ese.14.31.19294-en