For months, Vanderbilt University researcher Dr. James Crowe has been desperately seeking access to the blood of U.S. Ebola survivors, hoping to extract the proteins that helped them overcome the deadly virus for use in new, potent drugs.

His efforts finally paid off in mid-November with a donation from Rick Sacra, a University of Massachusetts physician who contracted Ebola while working in Liberia. The donation puts Crowe at the forefront of a new model for fighting the virus, now responsible for the worst known outbreak in West Africa that has killed nearly 7,000 people.

"They can take antibodies they find in my blood and map them out," Sacra said in an interview. "They are looking for the ones that are most important in neutralizing the virus."