The House Energy and Commerce Subcommittee on Oversight and Investigations holds a noon hearing on the U.S. response to the Ebola virus, which has killed more than 4,000 people since the outbreak began in December 2013. Dr. Tom Frieden, director of the Centers for Disease Control and Prevention, and Dr. Anthony Fauci, director of the National Institute of Allergy and Infectious Diseases, will testify on what the World Health Organization on Monday called "the most severe, acute health emergency seen in modern times." Additional witnesses include representatives from Texas Health Resources, the Food and Drug Administration, the Department of Health and Human Services and the Department of Homeland Security. Roll Call Election Map: Race Ratings for Every Seat Get breaking news alerts and more from Roll Call in your inbox or on your iPhone.