Live

Watch CBSN Live

First phase 3 trial of a coronavirus vaccine in the U.S. begins

The largest and final phase of a clinical trial to test Moderna's coronavirus vaccine in the U.S. has officially begun, as daily case numbers continue to rise in dozens of states. CBS News' Laura Podesta reports, and Dr. Ron Elfenbein joined CBSN to discuss the latest developments.
View CBS News In
CBS News App Open
Chrome Safari Continue