Dr. Roy is the Director of Infectious Disease Aerobiology at the Tulane National Primate Research Center and faculty in the Department of Microbiology and Immunology at Tulane University School of Medicine. His career focus is on respiratory health and the aerobiology of airborne infectious diseases, including biological threat agents such as anthrax and ricin to name a few. He is currently leading a research team to advance vaccine development for COVID-19. He talks to us about his latest work, and how we should think about the virus in relationship to masks.