Schaffer is a science writer focusing on medicine and health. She is a frequent contributor to the New Yorker online, where she's written about epidemic disease, vaccines, how our bones influence our minds, and how Jehovah's Witnesses are changing medicine. She has served as a science and medical columnist for Slate magazine and contributed to numerous publications, including the New York Times, the Washington Post, the Atlantic, and Bookforum. She is also a contributing editor at Technology Review magazine and a mentor-editor for the Op-Ed Project, which works to increase women's presence in public commentary. Follow @abschaffer.