The director of the Centers for Disease Control and Prevention has grown increasingly concerned that President Donald Trump, pushed by a new member of his coronavirus task force, is sharing incorrect information about the pandemic with the public. Dr. Robert Redfield, who leads the CDC, suggested in a conversation with a colleague Friday that Dr. Scott Atlas is arming Trump with misleading data about a range of issues, including questioning the efficacy of masks, whether young people are susceptible to the virus and the potential benefits of herd immunity.