Bushy, Katie and Jed chat to Professor Peter Doherty about Pandemics. Peter has shared the Nobel Prize in Physiology for Medicine in 1996 with Swiss colleague Rolf Zinkernagel, for their discovery of how the immune system recognises virus-infected cells. He was Australian of the Year in 1997, and has since been commuting between St Jude Children's Research Hospital in Memphis and the Department of Microbiology and Immunology at the University of Melbourne.