Vaping is linked to a substantially increased risk of COVID-19 among teenagers and young adults, according to a new study led by researchers at the Stanford University School of Medicine. As part of our ongoing COVID-19 coverage, Dr. Greg Davis talks about the study with Ellen Hahn, Marcia A. Drake Professor in the UK College of Nursing and Public Health, and Director of BREATHE including the Tobacco Policy Division, the Kentucky Center for Smoke-free Policy (KCSP), and the Radon Policy Division.