AlHijjah 22, 1435, Oct 16, 2014, SPA -- The African Union has appealed to all leaders in the continent to contribute health workers and specialists to staff new Ebola clinics and hospitals being built in West Africa, its chairperson said on Thursday, Reuters reported. Global health authorities are struggling to contain the world's worst Ebola epidemic since the haemorrhagic disease was identified in 1976. The virus - still spreading in West Africa - has killed nearly 4,500 people, with confirmed, probable and suspected cases reported in seven countries, including the United States. Though hundreds of millions of dollars have been committed and new Ebola clinics and hospitals are being built, aid agencies say there too few volunteers. The Addis Ababa-based bloc has already deployed around 100 volunteers in Liberia, where -- as in Sierra Leone and Guinea -- healthcare systems are collapsing. "We have written to our members' heads of state to see if each country can give us maybe up to 10 or 20 each," Nkosazana Dlamini-Zuma, Chairperson of the African Union Commission, told reporters. -- SPA 22:20 LOCAL TIME 19:20 GMT تغريد