NPR

US Vaccine Candidate Heads To Widespread Testing In People

A COVID-19 vaccine candidate developed by the US company Moderna and the National Institutes of Health starts its final phase of testing today. It's one of a handful of candidates to reach this stage.
Biotech company Moderna, headquartered in Cambridge, Massachusetts, announced today that it is beginning Phase 3 trials of its COVID-19 vaccine. It will enroll up to 30,000 volunteers.

The COVID-19 vaccine candidate made by the U.S. biotech company Moderna, Inc. and developed in collaboration with the National Institutes of Health starts its final phase of testing today.

This phase is called Phase 3 efficacy testing and it is designed to know who is getting what.

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