An expert panel that advises the CDC voted unanimously on Saturday to recommend use of Moderna’s Covid-19 vaccine. When CDC Director Robert Redfield signs off on the recommendation — as he is expected to do before the weekend is out — Operation Warp Speed will be able to begin shipping doses of a second vaccine to administration sites across the country. … The ACIP, as the group is known, voted 11 to 0 to support use of the vaccine in people 18 years old and up.