Doctors are becoming increasingly certain that immunologythe study of the body's natural defenses against illnesswill eventually provide the key to understanding and controlling cancer. Last week that conviction was strengthened when some 2,000 of the world's foremost medical scientists met in Manhattan under the joint sponsorship of the American Cancer Society and the National Cancer Institute to report their progress in human cancer research. Among the most recent findings:
> There is new evidence that the main cancer villains are viruses, submicroscopic packets of nucleic acids that can invade cells and take...
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