https://www.science.org/content/article/unqualified-failure-polio-vaccine-policy-left-thousands-kids-paralyzed - discu.eu

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Here’s How Quickly Could Polio Return to the U.S. without Vaccines | Scientific American https://www.scientificamerican.com/article/heres-how-quickly-could-polio-return-to-the-u-s-without-vaccines/ 11 comments

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