Operation Warp Speed officials are confident they’ll have millions of doses of COVID-19 vaccine ready for distribution by the year-end or early 2021 timeline that’s been touted by HHS and Trump administration officials. But whether those vaccines actually get distributed in that timeframe is contingent on when FDA grants emergency use authorization or approval and on whether the entities in charge of independently reviewing the clinical trial data will give vaccine makers the go-ahead to continue their studies, Paul Mango,...