Around 100 years ago, what discovery was made that is considered one of the greatest breakthroughs in medical history, saving millions of lives around the world?
Insulin. On May 3, 1922, John Macleod announced the discovery of insulin to the international medical community. It was discovered by Sir Frederick G Banting, Charles H Best, and and Macleod at the University of Toronto in 1921 and it was later purified by James B Collip. (Source: Diabetes.org.uk )
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