Nobel Medicine Prize winner Rolf Zinkernagel of Switzerland is all smiles while he answers journalis..,...

Nobel Medicine Prize winner Rolf Zinkernagel of Switzerland is all smiles while he answers journalists' questions in his office at the Institute of Experimental Immunology at the University of Zurich, October 7. Zinkernagel who shares the $ 1.12 prize with Australian-born Peter Doherty won the award for discoveries made while working in Australia on how the body detects virus-infected cells. Sweden's Karolinska Institute said the scientists' work at the John Curtin School of Medical Research in Cranberra from 1973 to 1975 had been crucial for understanding the mechanisms used by humans to recognise foreign bodies.