Jon G. Ayres BSc MBBS MD FRCP FRCPE FFOM FRCPSG - Professor of Environmental and Respiratory Medicine, School of Health and Population Sciences, University of Birmingham, UK Roy M. Harrison OBE BSc PhD DSc CChem FRSC FRMetS Hon MFPH HonFFOM -Queen Elizabeth II Birmingham Centenary Professor of Environmental Health, Division of Environmental Health & Risk Management, University of Birmingham, UK Gordon L. Nichols PhD MSB CBiol FRSPH - Consultant Epidemiologist, Gastrointestinal, Emerging and Zoonotic Infections Department, Centre for Infections, Health Protection Agency, London, UKRobert L. Maynard CBE FRCP FRCPath FBTS - Honorary Professor of Environmental Medicine, University of Birmingham, UK