A banner encouraging people suffering from Ebola to go immediately to a health center for treatment is seen on a sidewalk in the city of Freetown, Sierra Leone, Thursday, Aug. 7, 2014. While the Ebola virus outbreak has now reached four countries, Liberia and Sierra Leone account for more than 60 percent of the deaths, according to the World Health Organization. The outbreak that emerged in March has claimed at least 932 lives. (AP Photo/Michael Duff)LONDON (AP) — The World Well being Group on Friday declared the Ebola outbreak in West Africa to be an international public well being emergency that requires a uncommon response to stop its unfold.