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Published On 6 Oct 2025
The Nobel Prize in Physiology or Medicine has been awarded to Mary E. Brunkow, Fred Ramsdell and Shimon Sakaguchi for their work on the functioning of the human immune system.
The award, announced by Sweden’s Karolinska Institute on Monday, was handed to the trio for “their groundbreaking discoveries concerning peripheral immune tolerance that prevents the immune system from harming the body”.
The research “relates to how we keep our immune system under control so we can fight all imaginable microbes and still avoid autoimmune disease,” said Marie Wahren-Herlenius, a rheumatology professor at the Karolinska Institute.
The prize of 11 million Swedish kronor ($1.17 million) is to be shared equally between Brunkow and Ramsdell of the United States and Japan’s Sakaguchi.
The king of Sweden will also present them with a gold medal.
“Their discoveries have laid the foundation for a new field of research and spurred the development of new treatments, for example for cancer and autoimmune diseases,” the prize-awarding body said in a statement.
The Nobel Prize in Physiology or Medicine 2025 kicks off the annual Nobel awards, arguably the most prestigious prizes in science, literature, peace and economics. The winners of the remaining prizes will be announced over the coming days.
United States President Donald Trump has asserted numerous times that he should receive the Nobel Peace Prize, having claimed to have halted 7 wars since taking office at the start of the year..
However, regardless of apparent resistance among the assemblies that select the winners, the US president is unlikely to receive this year’s peace prize as nominations had to be made in January.
This is a developing news story. More to come…