Vaccine Safety to Remain Unclear Until Millions Get Their Shots

Monitoring Covid-19 vaccines for safety issues will fall to a group of U.S. health agencies that also will have a hand in their rollout, a potential hurdle in persuading skeptics to get the shots, say former government officials who helped control an outbreak a decade ago.

The Centers for Disease Control and Prevention, the Food and Drug Administration, the Department of Veterans Affairs and other health agencies all have separate systems to track side effects and safety in people who get the first shots. But there are concerns the groups advising the agencies on all aspects of a ...