The war against cancer is no pitched battle but a long attrition by patrols and probing actions. Last week the annual meeting of the American Association for Cancer Research in Chicago heard reports from some of its patrols. No secret weapon was unveiled and no immediate break through was foreshadowed, but the progress was steady and encouraging.
One major handicap in cancer research has been the difficulty of growing human cancers in laboratory animals so that a whole arsenal of chemicals, viruses and antibiotics may be tested directly upon the human instead of the animal varieties of the disease. Dr. Helene Wallace...
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