“And then,” Levy continued, “in 1975, suddenly, Milstein and Köhler came up with this method of fusing a plasma cell with a cancer cell. The fusion enabled the antibody-making cell to live forever.” Levy’s face grew animated; his hands began to drum his desk. “It was a revelation. A bon-aaaaaa-nza. Ironically, we could use the immortality of a cancer cell [fused with a plasma cell] to make an immortal cell to produce an antibody against cancer. We could fight fire with fire.”