Operation Warp Speed chief adviser: Hesitation about vaccine is ‘concerning’

Dr. Moncef Slaoui, chief adviser to Operation Warp Speed, tells ‘America’s Newsroom’ that the U.S. is committed to immunizing the U.S. population by the end of 2021 and addresses public fears about the vaccinations. Subscribe to Fox News! https://bit.ly/2vBUvAS Watch more Fox News Video: http://video.foxnews.com Watch Fox News Channel Live: http://www.foxnewsgo.com/