Epidemiologist Dr. Larry Brilliant explains to Ian Bremmer the tools and tracking apps that can help keep people informed about where the coronavirus is and how to avoid it. In an interview for GZERO World, Dr. Brilliant also discusses the new partnership between Apple and Google to share information and data on contact tracing. It's a 30% solution, he explains, as half the world—the poorest, oldest, or those in the most remote spots—do not have access to smartphones. But it is a start, and a positive step, he says.