VIDEO: Bay-Region Horseshoe Crabs Key to COVID-19 Vaccine Success

Horseshoe crabs collected off the coast of Ocean City, Md. and the Delaware beaches are making a major contribution to the coronavirus vaccine, and probably every other vaccine you’ve received.

Their “magic” blue blood can test for contamination in a vaccine supply, to ensure you won’t get a bacterial infection from your shot. Cheryl Costello shows us the fascinating process of harvesting blood from these prehistoric creatures, right here in the Bay region. Watch below: