KOUREMALE-At a border post in Kouremale in Mali, about 130 km (80 miles) south of the capital Bamako, five health workers stand under a thatched roof, directing passengers arriving from Guinea to wash their hands.
Their temperatures are then taken with digital guns to check for fever, one of the early symptoms of the deadly Ebola virus that originated in Guinea and has spread to its southern neighbours Sierra Leone and Liberia.