In this photo taken on Tuesday, Aug 12, 2014, a healthcare worker, right, wears protective gear against the Ebola virus before he enters the Ebola isolation ward at Kenema Government Hospital, in Kenema, the Eastern Province around 300km, (186 miles), from the capital city of Freetown in Sierra Leone. Over the decades, Ebola cases have been confirmed in 10 African countries, including Congo where the disease was first reported in 1976. But until this year, Ebola had never come to West Africa. (AP Photo/ Michael Duff)