While much of the focus on the coronavirus pandemic in the U.S. has centered around our major cities, tribal lands could be even more vulnerable. Among them, the Navajo Nation has been hit the hardest. Home to about 175,000 people, the tribe has per capita infection rate surpassed only by New Jersey and New York. Dean Seneca is a member of the Seneca Nation and infectious disease expert who spent nearly 20 years as a senior health scientist for the CDC. Soledad O’Brien speaks with him about what is fueling the virus’ rapid spread through tribal lands.