Watch: Pig Lungs Filter Human Blood in a Lab

Human blood filters through pig lungs in the lab of Lars Burdorf at the University of Maryland School of Medicine. Thousands of people die every year for lack of transplantable human organs. Scientists are experimenting with a technique called CRISPR to rid pig organs of viruses that harm humans. Pig organs have already been successfully transplanted into primates. Published July 11, 2016.

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