About the Authors
MRC Centre for Outbreak Analysis and Modelling, Department of Infectious Diseases Epidemiology, Imperial College London, London, United Kingdom
Microbial Risk Assessment, Emergency Response Department, Centre for Emergency Preparedness and Response, Health Protection Agency, Wiltshire, United Kingdom
The authors have declared that no competing interests exist.
Conceived and designed the experiments: JL NMF. Performed the experiments: JL JRE IMH SC SL NMF. Analyzed the data: JL JRE IMH SC NMF. Contributed reagents/materials/analysis tools: JL SC NMF. Wrote the paper: JL JRE IMH SC SL NMF.