Peter Charles Doherty (born 15 October 1940) is an Australian immunologist and Nobel laureate. He received the Albert Lasker Award for Basic Medical Research in 1995, the Nobel Prize in Physiology or Medicine jointly with Rolf M. Zinkernagel in 1996 and was named Australian of the Year in 1997. In the Australia Day Honours of 1997, he was named a Companion of the Order of Australia for his work with Zinkernagel. He is also a National Trust Australian Living Treasure. In 2009 as part of the Q150 celebrations, Doherty's immune system research was announced as one of the Q150 Icons of Queensland for its role as an iconic "innovation and invention". Early life and education Peter Charles Doherty was born in the Brisbane suburb of Sherwood on 15 October 1940, to Eric Charles Doherty and Linda Doherty (née Byford). He grew up in Oxley, and attended Indooroopilly State High School (which now has a lecture theatre named after him). After receiving his bachelor's degree in veterinary science in 1962 from the University of Queensland, he was a rural veterinary officer for the Queensland Department of Agriculture and Stock before taking up laboratory-based work at the Department's Animal Research Institute. There he met microbiology graduate Penelope Stephens and they were married in 1965. Doherty received his master's degree in veterinary science in 1966 from the University of Queensland. He obtained his PhD in pathology in 1970 from the University of Edinburgh, Scotland, then returned to Australia to continue his research at the John Curtin School of Medical Research within the Australian National University in Canberra. Research and career Doherty's research focuses on the immune system and his Nobel work described how the body's immune cells protect against viruses. He and Rolf Zinkernagel, the co-recipient of the 1996 Nobel Prize in Physiology or Medicine, discovered how T cells recognise their target antigens in combination with major histocompatibility complex (MHC) proteins. Viruses infect host cells and reproduce inside them. Killer T-cells destroy those infected cells so that the viruses cannot reproduce. Zinkernagel and Doherty discovered that, in order for killer T cells to recognise infected cells, they had to recognise two molecules on the surface of the cell – not only the virus antigen, but also a molecule of the major histocompatibility complex (MHC). This recognition was done by a T-cell receptor on the surface of the T cell. The MHC was previously