As Ebola Spreads, New Drug Offers Hope Listen Download Embed Share Share this on Facebook (Opens in a new window) Share this on Twitter (Opens in a new window) Share this via Email Proteins glow under ultraviolet light on the leaves of the nicotiana benthamiana plant, which is a close relative of tobacco, and used in the production of Zmapp. ( Sean Gallup / Getty ) Produced by Jillian Weinberger and Ellen Frankman Produced by PRI and WNYC