Medicine: From a Sick Chicken

One thing that medicine's learned men once knew, or thought they knew, was that cancer is not infectious. Therefore, no "infectious agent" could be involved in its origin. Then a young (31) researcher just starting in at Manhattan's Rockefeller Institute for Medical Research, went to work on a sick Plymouth Rock hen. He took material from a tumor on the bird's breast, ground it ultrafine to smash the very cells, filtered the stuff through silica so that not even a broken cell could pass, and injected the liquid into healthy chickens. They soon developed cancers of the same type (sarcoma) as...

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