A vaccine to help battle future Ebola outbreaks may be just a few years away. During the past decade researchers have made significant progress, and vaccines have worked in nonhuman primates. But it has been hard to raise money for human safety tests. To learn about the latest advances as well as obstacles, Scientific American spoke to UTMB’s Thomas Geisbert. He’s studied the Ebola virus since 1988 and is currently involved in vaccine research and development.