About the Authors

Ben S Cooper, Richard J Pitman, W. John Edmunds, Nigel J Gay
Statistics, Modelling, and Bioinformatics Department, Centre for Infections, Health Protection Agency, London, United Kingdom

Corresponding Author

ben.cooper@hpa.org.uk

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

BSC, WJE, and NJG conceived the study. RJP obtained and processed the travel data. BSC implemented and analysed the model. All authors contributed to writing the manuscript.