One of the country's leading scientists on the subjects say sharks' immune systems can block human cancer cells.
Dr. Carl Luer is one of America's foremost leaders in this subject. He said it's long been known that sharks rarely get sick.
"Sharks have a low incidence of disease in general and what's interesting is they have a low incidence of cancer," said Dr. Luer.
He says the fish have incredibly powerful immune systems.
"We've tried to give them cancer and we've not been able to do that," said Dr. Luer.
Copyright 2016 Nexstar Broadcasting, Inc. All rights reserved. This material may not be published, broadcast, rewritten, or redistributed.