2025 Nobel Prize in Physiology or Medicine: One-minute crash course

The immune system’s security guards

What happens if our immune system attacks our own cells?

The Nobel Prize in Physiology or Medicine 2025 is about our immune system. The immune system protects us from viruses, bacteria and other kinds of microorganisms. The Nobel Prize laureates Mary E. Brunkow, Fred Ramsdell and Shimon Sakaguchi have discovered previously unknown immune cells, so-called regulatory T cells, that act as the immune system’s security guards and prevent immune cells from attacking our own body. 

Watch our one-minute crash course to discover the 2025 Nobel Prize in Physiology or Medicine.

Learn more

Text for students about the 2025 Nobel Prize in Physiology or Medicine

Press release for the 2025 Nobel Prize in Physiology or Medicine

Popular information about the 2025 Nobel Prize in Physiology or Medicine

To cite this section
MLA style: 2025 Nobel Prize in Physiology or Medicine: One-minute crash course. NobelPrize.org. Nobel Prize Outreach 2025. Fri. 5 Dec 2025. <https://www.nobelprize.org/educational/2025-crash-course-medicine/>