John Tlumacki/The Boston World by using Getty Illustrations or photos If you have ever gotten a vaccine or acquired an intravenous drug and did not come down having a potentially daily life-threatening fever, you could thank a horseshoe crab. Rabbits undergoing a pyrogen exam inside of a laboratory in 1956 https://sergiomithy.prublogger.com/29704234/little-known-facts-about-horseshoe-crab-blue-blood