The U.S. Public Health Service, usually encased in a plaster cast of bureaucratic caution, took a relatively bold step last week. On the smoking-and-cancer question, it advanced from its guarded 1954 position ("some evidence of a statistical association"), last week announced: "There is an increasing and consistent body of evidence that excessive cigarette smoking is one of the causative factors in lung cancer . . . and there is a direct relationship between the incidence of lung cancer and the amount smoked."
Surgeon General Leroy E. Burney made this statement because of PHS concern "with broad factors which substantially affect the health...
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