the transfusion to Dr. Brantly may be his best chance...

it was highly successful when first tried 20 years ago. What makes it so difficult is that there are so few survivors and usually the outbreak has run its course by the time they have any. They need to start collecting blood from survivors and freezing it for future use.

http://www.newsweek.com/20-year-old-ebola-treatment-could-save-kent-brantly-262552

"Then, in the last days, a nurse at Kikwit General Hospital, who had volunteered to care for a pair of Ebola-infected Italian nuns, developed symptoms of Ebola hemorrhagic fever.

“The rest of the team became concerned,” says Colebunders, and some of the medical professionals there who had suffered through and survived an earlier infection (“convalescent patients” in the literature) wanted to donate some of their blood to the nurse. “The Americans and Scientists from the States didnt believe it could work,” says Colebunders, but the Congolese doctors did it anyway. The same blood transfusion procedure was repeated for seven others who were ill, the final group of Ebola-stricken patients in the hospital.

The results were staggering: seven of the eight survived. "