RT Journal Article SR Electronic(1) A1 Vega, T YR 2001 T1 Influenza in Europe still below the epidemic threshold JF Weekly releases (1997–2007) VO 5 IS 49 SP 2069 OP DO https://doi.org/10.2807/esw.05.49.02069-en UL https://www.eurosurveillance.org/content/10.2807/esw.05.49.02069-en