Nobel Prize in medicine goes to trio of scientists for discovering how the immune system is kept in check

Video Ad Feedback What you should know about the Nobel Prize 1:05 • Source: CNN

What you should know about the Nobel Prize 1:05

The 2025 Nobel Prize in physiology or medicine has been awarded to a trio of scientists for discovering how the immune system protects us from thousands of different microbes trying to invade our bodies.

Mary E. Brunkow, Fred Ramsdell and Shimon Sakaguchi will share the prize “for their fundamental discoveries relating to peripheral immune tolerance,” the Nobel Committee announced Monday at a ceremony in Stockholm, Sweden.

The laureates identified “regulatory T cells,” which function like the immune system’s security guards and prevent immune cells from attacking our own body.

“Their discoveries have been decisive for our understanding of how the i