Betsy Klein and Sierra Leone joins fight of Ebola outbreak in Liberia . More than 2,200 people have died in Guinea , West Africa and Melinda Gates Foundation . Money will be used to purchase supplies and scale up emergency operations .
Bill and Melinda Gates Foundation joins fight of Ebola outbreak in West Africa . More than 2,200 people have died in Guinea , Liberia and Sierra Leone . Money will be used to purchase supplies and scale up emergency operations .