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Replication mechanism: Salvador Luria, a Nobel Prize-winning microbiologist, made significant contributions to our understanding of viruses. His research focused on the replication mechanism of viruses, particularly bacteriophages, which infect bacteria. Luria's work helped establish the concept of viral replication as a distinct process from bacterial cell division, and he identified key steps in the viral replication cycle, including adsorption, penetration, uncoating, replication, assembly, and release.