What will the next influenza season bring about: seasonal influenza or the new A(H1N1)v? An analysis of German influenza surveillance data Uphoff, H and Geis, S and GrĂ¼ber, A and Hauri, A M, Eurosurveillance, 14, 19303 (2009), https://doi.org/10.2807/ese.14.32.19303-en