In the 1950s, American virologist Jonas Salk improved the health of millions when he created a vaccine for polio. But what made his contribution even more significant was his refusal of a legal patent for his invention. Salk wanted everyone to benefit. Almost 70 years later, global scientists are searching for a vaccine for COVID-19, with politicians, experts and elders calling for one to be made available to all - and at no cost. Our host James Chau takes a deep dive into this story.
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