Professor Peter Simmonds studies the epidemiology, evolution and emergence of a wide range of human pathogenic viruses. RNA viruses are major pathogens that represent the majority of new viruses emerging over time. They are particularly good at evading the host's response to infection. A better understanding of the interaction between virus and host can lead to a better control of viral infections. Recent discoveries on viral genome composition and structure might allow us to manipulate this interaction and generate new, safer vaccines. Creative Commons Attribution-Non-Commercial-Share Alike 2.0 UK: England & Wales; http://creativecommons.org/licenses/by-nc-sa/2.0/uk/