Uptake and impact of a new live attenuated influenza vaccine programme in England: early results of a pilot in primary school-age children, 2013/14 influenza season Pebody, R G and Green, H K and Andrews, N and Zhao, H and Boddington, N and Bawa, Z and Durnall, H and Singh, N and Sunderland, A and Letley, L and Ellis, J and Elliot, A J and Donati, M and Smith, G E and de Lusignan, S and Zambon, M, Eurosurveillance, 19, 20823 (2014), https://doi.org/10.2807/ese.19.22.20823-en