In the coming years, Southam injected HeLa and other living cancer cells into more than six hundred people for his research, about half of them cancer patients. He also began injecting them into every gynecologic surgery patient who came to Sloan-Kettering’s Memorial Hospital or its James Ewing Hospital. If he explained anything, he simply said he was testing them for cancer. And he believed he was: Since people with cancer seemed to reject the cells more slowly than healthy people did, Southam thought that by timing the rejection rate, he might be able to find undiagnosed cases of cancer.
