Covid-19: Vaccine put to final test in 30,000 volunteers in U.S.

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A total of 30,000 planned volunteers are ready to take Covid-19 vaccine created by the U.S. government -- one of several candidates in the final stretch of the global vaccine race.
The world’s biggest COVID-19 vaccine study got underway on Monday.
However, there’s still no guarantee that the experimental vaccine, developed by the National Institutes of Health and Moderna Inc., will really protect, reports AP. Read more
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