A clinical trial to evaluate the experimental Ebola treatment ZMapp found it to be safe and well-tolerated; however, because of the waning Ebola epidemic, the study enrolled too few people to determine definitively whether it is a better treatment for Ebola virus disease (EVD) than the best available standard of care alone. The findings from the randomized, controlled trial known as PREVAIL II appear in the Oct. 13, 2016 issue of The New England Journal of Medicine. Initial trial findings were reported in February 2016, at the Conference on Retroviruses and Opportunistic Infections in Boston.