In 1969 Luria shared the Nobel Prize in Physiology or Medicine in with Delbrück (No. 2578.5) and A. D. Hershey (No. 256) "for their discoveries concerning the replication mechanism and the genetic structure of viruses."

Following Max Delbruck's advice, Dulbecco visited the major centers of animal virus work in the US in order to discover a way to quantitatively assay animal viruses by a plaque technique, similar to the technique that had recently been developed for bacterial viruses (bacteriophages). Within less than a year Dulbecco worked out such a method for Western equine encephalitis virus, which then opened up animal virology to quantitative work. The technique was then used by Dulbecco and Vogt to study the biological properties of poliovirus. Digital facsimile from PubMedCentral at this link.

Dulbecco and Vogt were the first to successfully grow the poliovirus in vitro. They were also able to plaque purify it-- an essential step for subsequent vaccine production.

Polyomavirus (papovavirus) shown to be capable of transforming cells in culture.  Full text from PubMedCentral at this link.

Dulbecco and his group demonstrated that the infection of normal cells with certain types of viruses (oncoviruses) led to the incorporation of virus-derived genes into the host-cell genome, and that this event lead to the transformation (the acquisition of a tumor phenotype) of those cells. Order of authorship in the original publication: Sambrook, Westphal, Srinvasan, Dulbecco. Digital facsimile from PubMedCentral at this link.

In 1975 Dulbecco shared the Nobel Prize in Physiology or Medicine with David Baltimore and Howard Temin "for their discoveries concerning the interaction between tumour viruses and the genetic material of the cell."

In 1975 Dulbecco shared the Nobel Prize in Physiology or Medicine with David Baltimore and Howard Martin Temin "for their discoveries concerning the interaction between tumour viruses and the genetic material of the cell."