In 1942, Merrill Chase discovered that cells taken from the peritoneum of Guinea pigs that had been immunized against an antigen could transfer immunity when injected into Guinea pigs that had never been exposed to the antigen; this phenomenon was the discovery of cell-mediated immunity.
The O'Reilly Factor | The X Factor (UK) | Microphthalmia-associated transcription factor | The X Factor | File Transfer Protocol | The Manhattan Transfer | Fear Factor | Max Factor | Asynchronous Transfer Mode | Hypertext Transfer Protocol | The X Factor (TV series) | B-cell activating factor | Manhattan Transfer | Epidermal growth factor receptor | Transfer of sovereignty over Hong Kong | transfer | Simple Mail Transfer Protocol | transfer window | SSH File Transfer Protocol | Psi Factor: Chronicles of the Paranormal | Astro Boy: Omega Factor | twist transcription factor | Trivial File Transfer Protocol | Transfer RNA | The X Factor (U.S.) | The X Factor (UK TV series) | The X Factor (UK series 2) | The Omega Factor | The Gruen Transfer | The Butch Factor |