RT Journal Article SR Electronic(1) A1 Watson, J YR 2001 T1 Low levels of influenza activity continue in Europe JF Weekly releases (1997–2007) VO 5 IS 5 SP 1813 OP DO https://doi.org/10.2807/esw.05.05.01813-en UL https://www.eurosurveillance.org/content/10.2807/esw.05.05.01813-en