Vaccine effectiveness of 2011/12 trivalent seasonal influenza vaccine in preventing laboratory-confirmed influenza in primary care in the United Kingdom: evidence of waning intra-seasonal protection
Pebody, R G and Andrews, N and McMenamin, J and Durnall, H and Ellis, J and Thompson, C I and Robertson, C and Cottrell, S and Smyth, B and Zambon, M and Moore, C and Fleming, D M and Watson, J M, Eurosurveillance, 18, 20389 (2013), https://doi.org/10.2807/ese.18.05.20389-en