The Nobel Prize in medicine goes to 3 scientists for key immune system discoveries

A screen showing the photos of Mary E Brunkow, Fred Ramsdell and Shimon Sakaguchi who were awarded the Nobel Prize in Medicine or Physiology, at the Nobel Assembly of the Karolinska Institutet, in Stockholm, Sweden, Monday, Oct. 6, 2025. (Claudio Bresciani/TT News Agency via AP)