Freada Kapor Klein stands on a staircase at the Kapor Center for Social Impact in Oakland, Calif. She is a high profile investor, who invested early on with Uber. She has used her voice and her money in a decades-long effort to promote more diversity in Silicon Valley.
Talia Herman for NPR
A sometimes lethal strain of H7N9 bird flu that has infected about 1,500 people in China doesn't spread easily among humans — yet. But research published Thursday suggests just a few genetic mutations might be enough to make it quite contagious.