Health workers in protective suits look at an ambulance upon its arrival at Island Hospital in Monrovia on September 30, 2014. Liberia has been hit the hardest by the worst ever outbreak of Ebola, which has killed more than 3,000 people in west Africa. The latest UN data said 1,830 people have died from the killer virus in Liberia so far, and 3,458 people have been infected. AFP PHOTO / PASCAL GUYOT        (Photo credit should read PASCAL GUYOT/AFP/Getty Images)