50 years ago, polio was still circulating in the United States
Excerpt from the September 13, 1969 issue of Science News
The world has never been closer to eradicating polio, but the disease could come roaring back where vaccination rates have slipped.
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Polio could come back, Science News, September 13, 1969 —
Only eight cases of paralytic polio have been reported in the entire United States so far in 1969.