Exposure: Erika Check Hayden & Ali Mattu

Part 1: Journalist Erika Check Hayden travels to Sierra Leone and sees Ebola up close and personal for the first time.

Part 2: As a child, psychologist Ali Mattu suffers from paralyzing social anxiety.

Erika Check Hayden is an award-winning San Francisco-based science, health, and technology reporter. She writes for the science journal Nature, and on a freelance basis for a variety of publications. She is the incoming director of the University of California, Santa Cruz, Science Communication Program. Find her at erikacheck.com or on Twitter @Erika_Check.

Ali Mattu is a clinical psychologist who specializes in the treatment of anxiety and body-focused repetitive behaviors (trichotillomania/hair-pulling disorder and excoriation/skin-picking disorder). He aspires to bring psychology to everyone, everywhere by hosting THE PSYCH SHOW, writing about the psychology of science fiction at Brain Knows Better, presenting to the public, and advocating for the brain and behavior sciences through the American Psychological Association. Dr. Mattu is an assistant professor at the Columbia University Medical Center.