The company had placed its worldwide vaccine trials on hold for several days. It now says a safety review by regulators and reviewers is complete. No word on when studies in the U.S. might resume.
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Joe Palca is a science correspondent for NPR. Since joining NPR in 1992, Palca has covered a range of science topics — everything from biomedical research to astronomy. He is currently focused on the eponymous series, "Joe's Big Idea." Stories in the series explore the minds and motivations of scientists and inventors. Palca is also the founder of NPR Scicommers – A science communication collective.