Simple red lines on the floor are what mark the boundary between the low-risk zone and the high-risk zone Nov. 4, 2014, in the Monrovia Medical Unit, a facility designed for health care workers who become infected with the virus. The MMU still has some final work to be done before it is completed for the opening scheduled to open Nov. 8, 2014. Beyond those lines are the wards that will house suspected and confirmed Ebola patients. (U.S. Army photo by Sgt. 1st Class Nathan Hoskins, Joint Forces Command – United Assistance Public Affairs/RELEASED)