Transgenic is the missing word in the title, the pig was no ordinary pig.

> Andrews received a kidney from a pig with three types of genetic modification. One involved the elimination of three antigens to prevent organ rejection; another the addition of seven human genes that reduce inflammation and the risk of bleeding complications. Retroviruses that are found in the pig genome were also deactivated.

Still an amazing milestone. one of 3, the previous record was just over 4 months, organ then removed because of immune system rejection. There's a third person, at around 3 months. They have approval to test around 30 people.