Surgeons in China have performed the first-ever transplant of a gene-edited pig lung into a brain-dead human, marking a significant milestone in xenotransplantation.

In recent years, scientists have transplanted kidneys, livers, and hearts from gene-edited pigs into a human body. But this new research appears to show the first recorded instance of a gene-edited lung transplant.

In a first, scientists in China transplanted a lung from a pig into a human so they could see how the host immune system handled the procedure.