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Global News Hour at 6 BC
October 23 2021 9:54pm

COVID-19 parallels: polio disaster helped shape vaccine safety in 1950s

Sunday marks World Polio Day amid the global COVID-19 pandemic. Experts say we can learn from the highly infectious disease that spread in the first half of the 20th century in the same ways COVID-19 is transmitted now. Kristen Robinson explains how a polio disaster helped shape vaccine safety.

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