Horseshoe Crabs and the Covid-19 Vaccine

Here are three articles on how Horseshoe Crabs are helping with the development of a Covid-19 vaccine.

http://www.wboc.com/clip/15145682/horseshoe-crabs-can-be-used-to-test-covid-19-vaccines

https://www.usatoday.com/story/news/nation/2020/09/22/how-horseshoe-crab-holds-key-covid-19-south-carolina/5855940002/

http://www.wboc.com/story/42742322/the-role-of-delaware-bay-horseshoe-crabs-role-in-a-covid19-vaccine