2 ms·Genetically altered pig heart transplanted into a human for the second time3 points by iancmceachern 3y agoiancmceachern 3y agoHere is an interesting history: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3246856/ https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3246856/