As the season of epidemic polio moved northward, the quality and effectiveness of U.S. polio vaccine were being debated last week on both sides of the Atlantic. In Britain, despite a shortage of home-brewed vaccine, Health Minister Dennis Vosper took a harsh jab at the American product by announcing that he had "accepted expert medical advice that Britain should not run the risk of importing poliomyelitis vaccine." Snorted the British Medical Journal: "It is difficult to believe . . . that the safety of poliomyelitis vaccine as used now in the U.S.A. is...
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