50 years ago, polio was still circulating in the United States
Excerpt from the September 13, 1969 issue of Science News
![administering a polio vaccine](https://i0.wp.com/www.sciencenews.org/wp-content/uploads/2019/09/072219_ti_50-ya-polio-vaccine_feat.jpg?fit=1028%2C579&ssl=1)
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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