Early spread of the 2009 influenza A(H1N1) pandemic in the United Kingdom – use of local syndromic data, May–August 2009 Smith, S and Smith, G E and Olowokure, B and Ibbotson, S and Foord, D and Maguire, H and Pebody, R and Charlett, A and Hippisley-Cox, J and Elliot, A J, Eurosurveillance, 16, 19771 (2011), https://doi.org/10.2807/ese.16.03.19771-en