Susumu Tonegawa, first Japanese Nobel laureate in physiology or medicine, dies

Susumu Tonegawa, the Japanese molecular biologist who won the 1987 Nobel Prize in Physiology or Medicine for his discovery of the genetic principle behind antibody diversity, has died. His groundbreaking work on the immune system revolutionized understanding of how the body produces millions of different antibodies. Tonegawa was the first Japanese scientist to win a Nobel in that category, inspiring generations of researchers in Japan and worldwide.

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