%0 Journal Article %A Puig-Barberà, J %T 2010-2011 influenza seasonal vaccine, preliminary mid-season effectiveness estimates: reason for concern, confounding or are we following the right track? %D 2011 %J Eurosurveillance %V 16 %N 11 %P 19821 %R doi:https://doi.org/10.2807/ese.16.11.19821-en %K influenza like illness - ILI %K influenza %K vaccines and immunisation %U https://www.eurosurveillance.org/content/10.2807/ese.16.11.19821-en