Sport: Continuing Mystery

More cases of infantile paralysis were reported in the U.S. during 1949 than in any previous year. Last week the total passed 43,000. As the sad statistics piled up, officials of the U.S. Public Health Service combed through mountains of reports, noting where poliomyelitis had struck most heavily, hoping that locating the outbreaks would help to explain them. The results were discouraging.

A U.S. map was divided into two zones along a line running west from the southern boundary of Virginia (36° 30' N. Lat.) with 1,948 counties in the northern zone, 1,147 in the southern. Only 82 counties—distributed helter-skelter across the...

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