Ebola Virus for National Geographic Magazine

Medical staff at the Hastings Ebola Treatment Center work escort a man in the throes Ebola-induced delirium back into the isolation ward from which he escaped in Hastings, Sierra Leone on Sunday, November 23, 2014. In a state of confusion, he emerged from the isolation ward and attempted to escape over the back wall of the complex before collapsing in a convulsive state. A complete breakdown of metal facilities is a common stage of advanced Ebola. The man pictured here died shortly after this picture was taken. (Pete Muller/Prime for National Geographic)