Christopher D. Richardson is Professor, Department of Microbiology & Immunology, Department of Pediatrics, Dalhousie University, Canada. Dr. Chris Richardson is a molecular virologist with 35 years of experience working with a variety of viruses. He earned his PhD at the University of British Columbia and did postdoctoral work at The Rockefeller University and the National Institutes of Health (Bethesda, USA). He previously held faculty positions at the National Research Council of Canada, McGill University, and the University of Toronto. Nicholas H. Acheson is Emeritus Professor of Microbiology & Immunology at McGill University, Quebec, Canada. He earned his PhD from The Rockefeller University and was a postdoctoral fellow at the Swiss Institute for Experimental Cancer Research (Lausanne) and Institut Pasteur (Paris). He carried out research on Semliki Forest virus and mouse polyomavirus, and taught a virology course for advanced undergraduate students at McGill University.