In a world first, doctors in China transplanted a pig lung into a human body, and amazingly, the lung kept working for nine days. The patient was already brain-dead and on life support, but this breakthrough could one day help millions of people waiting for new organs.
The lung came from a genetically modified pig. Scientists changed its DNA to remove certain pig genes that usually cause the body to attack foreign tissue. They also added human genes to help the organ blend in better with the patient’s immune system.
At first, the lung worked just like a human one—it gave oxygen to the blood and removed carbon dioxide. Doctors were thrilled that there was no immediate “hyperacute rejection,” which is when the body destroys a new organ within hours.
But after about a day, problems started. The lung began to swell with fluid, and the body’s immune system slowly started fighting back. By day nine, the family chose to end the experiment. Even so, this was still a huge success for xenotransplantation—the use of animal organs in humans.
Right now, there’s a severe shortage of donated organs around the world. Thousands of people die every year while waiting for transplants. Scientists hope that animal organs, especially from pigs, could one day fill that gap. Pig hearts and kidneys have already been transplanted in similar experiments, but lungs are trickier because they’re so sensitive and exposed to the outside world.
Experts say there’s still a long way to go before pig lungs can be safely used in living patients. But this is a giant step forward—and proof that science is getting closer to a future where no one has to die waiting for an organ.
