RT Journal Article SR Electronic(1) A1 Paget, W J A1 Fleming, D M A1 Meijer, A A1 Samuelsson, S A1 Schweiger, B YR 2003 T1 Low but increasing levels of influenza activity in Europe: an update from EISS, week 43 JF Weekly releases (1997–2007) VO 7 IS 45 SP 2319 OP DO https://doi.org/10.2807/esw.07.45.02319-en UL https://www.eurosurveillance.org/content/10.2807/esw.07.45.02319-en