Bill Gates became one of the richest men in history after cofounding Microsoft. His impact on the world of personal computing cannot be overstated. But for more than 15 years, he has devoted himself to philanthropic work through the Bill & Melinda Gates Foundation. He is passionate about combating health inequities and diseases of poverty in developing countries. He has played a key role in wrestling polio to the verge of extinction; another major global health scourge, malaria, is in his sights.

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