When 1,500 of the world's leading experts gathered in Geneva last week for the fourth International Poliomyelitis Congress, they heard some good news and bad. The good: in countries using wide-scale vaccination, the disease is already on the decline. The bad: polio is breaking out in parts of the world where it has not previously been recognized.
Polio is on the rise in the tropics and in the Communist countries of Eastern Europe. Specialists gave two explanations. The World Health Organization's Dr. Anthony M.M. Payne argued that the increase is apparent, not real, and...
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