Medicine: Polio Progress Report

While most state and all federal health officials decided to wait until November before trying to assay the effectiveness of polio vaccination in 1956, Oregon's board of health got a jump on them last week by reporting its program a huge success. Among 350,000 Oregonians who have received at least one shot of Salk vaccine, there have been only 30 cases of polio in 1955 and 1956 to date, for a rate of less than 9 per 100,000. Among 1,340,000 unvaccinated there have been 480 cases, for a rate four times as high—36 per...

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