Biotech company Moderna, headquartered in Cambridge, Mass., announced that it is beginning Phase 3 trials of its COVID-19 vaccine. It will enroll up to 30,000 volunteers

CAMBRIDGE, MASSACHUSETTS – MAY 08: A view of Moderna headquarters on May 08, 2020 in Cambridge, Massachusetts. Moderna was given FDA approval to continue to phase 2 of Coronavirus (COVID-19) vaccine trials with 600 participants. (Photo by Maddie Meyer/Getty Images)