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A pig kidney is still functioning in a brain-dead man six weeks after transplant surgery. New York University Langone Health says this is the longest period a pig kidney has functioned in a human being. Surgeons transplanted the genetically engineered organ after the 57-year-old man's family agreed to donated his body because his organs weren't suitable for transplant. The NYU Langone Transplant Institute director said the kidney is doing all the jobs that a normal human kidney would do.