Living fossils to play key role in making sure COVID-19 vaccine is safe

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Horseshoe crabs have a unique type of blood that makes sure any medical product we put in our body is safe and free of bacteria. But scientists say the horseshoe crab population is vulnerable, and worry that the next decade is of “great concern” when it comes to their survival. Tom Hanson reports for the “CBS This Morning” series, Eye on Innovation.

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