APRIL 1955

VIRUS REPLICATION--"A new view of the nature of viruses is emerging. They used to be thought of solely as foreign intruders--strangers to the cells they invade and parasitize. But recent findings, including the discovery of host-induced modifications of viruses, emphasize more and more the similarity of viruses to hereditary units such as genes. Indeed, some viruses are being considered as bits of heredity in search of a chromosome. --Salvador E. Luria" [Editors' note: Luria shared the Nobel Prize in Physiology or Medicine in 1969 for his work on the replication and interaction of viruses.]

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