In 1968, he was recruited once more by soon-to-be Nobel laureate Salvador Luria to the department of biology at MIT as an associate professor of microbiology. Alice S. Huang also moved to MIT to continue her research on vesicular stomatitis virus (VSV). They became a couple, and married in October 1968. At MIT, Huang, Baltimore, and graduate student Martha Stampfer discovered that VSV involved an RNA-dependent RNA polymerase within the virus particle, and used a novel replication strategy to replicate its RNA genome. VSV entered a host cell as a single negative strand of RNA, but brought with it RNA polymerase to stimulate the processes of transcription and replication of more RNA.