In a 20-0 vote, with one abstention, a panel of advisers to the FDA recommended that the COVID-19 vaccine being developed by Moderna be authorized for emergency use in adults during the pandemic. If the agency authorizes the vaccine for emergency use, as is expected, it would become the second to be deployed in the U.S to fight the coronavirus. … The vaccine is 94% effective in preventing COVID-19, and the agency's analysis said there are no specific safety concerns that would stand in the way of authorization.