Researchers Win Nobel Prize for Uncovering How the Immune System Protects Itself

Key Takeaways

Three scientists have won the 2025 Nobel Prize for discovering regulatory T-cells

Their research revealed how the immune system prevents autoimmune disease

The discovery has led to new treatments for autoimmune disorders, cancer and transplant recovery

TUESDAY, Oct. 7, 2025 (HealthDay News) — Three immunologists have won the 2025 Nobel Prize in Physiology or Medicine for uncovering how the immune system prevents itself from attacking the body.

The discovery has opened new paths for treatment.

Immunologists Mary Brunkow , Fred Ramsdell and Shimon Sakaguchi discovered a special group of immune cells called regulatory T-cells.

These cells help keep the immune system balanced, stopping it from harming your body. Their research revealed a key part of how the immune sy