A genetically modified pig lung was transplanted into a brain-dead man and functioned for nine days, according to a newly published report.

A genetically modified pig lung transplanted into a brain-dead human patient functioned for nine days in a new achievement that reveals both the promise and significant challenges of xenotransplantation.

In a groundbreaking achievement, Chinese researchers successfully transplanted a genetically modified pig lung into a brain-dead man. The lung functioned for nine days, oxygenating blood, before immune responses led to its failure.