Much is said about the immune system of sharks. Among other things, fish didn’t have to be cancerous, which is why a ferocious shark cartilage business began. it was just superstition, A tiny component of a shark’s body’s defenses could perhaps help us in the fight against coronavirus in the future: tiny antibody-like proteins, so-called VNARs, that prevent coronaviruses from infecting human cells. This is what Aaron LeBeau from the University of Wisconsin-Madison and his team in “Nature Communications” report., However, there is still a long way to go before clinical application.