The world’s first patient with a transplanted pig kidney has been able to leave hospital almost three weeks after the operation. Rick Slayman is recovering well and will now continue his recovery at home with his family, the Massachusetts General Hospital in Boston announced on X, formerly Twitter, on Wednesday evening. “This moment – leaving the hospital today with one of the cleanest bills of health I’ve had in a long time – is one I wished would come for many years,” said the 62-year-old, according to doctors. “Now it’s a reality.” This day not only meant a new beginning for him, he said, b…