The U.S. Centers for Disease Control and Prevention has chosen Retsef Levi, a member of its key vaccine panel, to lead its COVID-19 immunization task force, a spokesperson for the health department told Reuters. Retsef Levi had critiqued mRNA vaccines in the past, saying they can cause serious harm and death, especially among children, and called for their immediate withdrawal. Retsef did not immediately respond to a Reuters request for comment. Bloomberg News was the first to report the news on Monday.