Medicine: Polio and Encephalitis

Over much of the U.S., polio was rampant last week. The Public Health Service reported 2,648 fresh cases in a single week, boosting the total for the "disease year" (which begins in late March) to 12,046. This was 71% more than in the same period last year, and alarmingly close to the 12,865 in 1949, which turned out to be the nation's peak epidemic year for polio.

But it was still too early to say whether 1952 was going to be like 1949. Each summer, the onslaught of poliomyelitis reaches its peak in late...

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