Another Polio Question?!

Question: what mistakes were made after the first polio vaccine came out?

Answers: what mistakes were made after the first polio vaccine came out?

The Salk vaccine released between 1955 and 1963 was contaminated with Simian Virus 40 (Rhesus monkeys). SV-40 is proven to cause cancer in research animals. The vaccines produced weren't adequately tested before release for general use. The FDA didn't act on this.

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Another Polio Question?!

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