RT Journal Article SR Electronic(1) A1 Nicoll, A A1 Ciancio, B C A1 Tsolova, S A1 Blank, P R A1 Yilmaz, C YR 2008 T1 The scientific basis for offering seasonal influenza immunisation to risk groups in Europe JF Eurosurveillance VO 13 IS 43 SP 19018 OP DO https://doi.org/10.2807/ese.13.43.19018-en UL https://www.eurosurveillance.org/content/10.2807/ese.13.43.19018-en