Third American with Ebola arrives for treatment in Nebraska

A US aid worker infected with Ebola in Liberia has arrived in Nebraska for treatment in an isolation unit.

Dr Rick Sacra, 51, a family doctor from Massachusetts, worked at the same hospital as the two other infected Americans, who are now recovering.One of them, Nancy Writebol, said resources at the hospital were insufficient to protect workers.The outbreak has killed more than 1,900 people and infected at least 3,500 in five West African countries.There have been 3,500 confirmed or probable cases in Guinea, Sierra Leone and Liberia."The outbreaks are racing ahead of the control efforts in these countries," WHO chief Margaret Chan said.