Irwin Redlener, professor of pediatrics and director of the National Center for Disaster Preparedness at Columbia University, co-founder of the Children's Health Fund, and the author of The Future of Us: What the Dreams of Children Mean for Twenty-First-Century America (Columbia University Press, 2017), talks about the latest on the COVID-19 pandemic and issues of testing, medical volunteers and disparities in outcomes by sex, age, income and race.