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Published 22:49 IST, July 27th 2020

Largest COVID-19 vaccine study under way in US

The world's biggest COVID-19 vaccine study got underway Monday with the first of 30,000 planned volunteers helping to test shots created by the U.S. government -- one of several candidates in the final stretch of the global vaccine race.

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22:49 IST, July 27th 2020