 Other key members of the Phage Group included Salvador Luria (1912–1991) and Alfred Hershey (1908–1997).During the 1950s, Hershey and Chase made important discoveries on the replication of DNA during their studies on a bacteriophage called T2.Together with Delbruck they were jointly awarded the 1969 Nobel Prize in Physiology or Medicine "for their discoveries concerning the replication mechanism and the genetic structure of viruses".