New variants of the coronavirus are circulating around the globe and causing some concern among experts. One in particular, variant B.1.1.7, has been found to more easily spread from one person to another.  This new variant has already been identified in several states in the US. To understand how this will affect the course of the pandemic, CNN’s Chief Medical Correspondent Dr. Sanjay Gupta speaks with virologist Angela Rasmussen.  To learn more about how CNN protects listener privacy, visit cnn.com/privacy