Finding immune cells that stop a body from attacking itself wins medicine Nobel

Work on peacemakers in the immune system won the 2025 Nobel Prize in physiology or medicine.

The peacemakers are regulatory T cells, a type of immune cell that calms the immune system after it has finished fighting infection or healing a wound. These special T cells also prevent the immune system from attacking the body. If they fail in this mission, autoimmune disorders or damaging inflammation can result. These cells are also important to prevent rejection of the fetus…