How the West waited 20 years to use Tu Youyou's Nobel prize-winning malaria discovery

The scientist told the World Health Organisation about artemisia in 1982, but it was decades before the plant which had been used for centuries in Chinese remedies was accepted by Western medicine. In 2004, Tu spoke to Didi Kirsten Tatlow about the personal sacrifices she had made while trying to reduce malaria's deadly toll.

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