As the coronavirus pandemic ripped through through the United States in March, scientists at Boston University′s National Emerging Infectious Diseases Laboratories (NEIDL) and the Center for Regenerative Medicine (CReM) dropped all other research to focus exclusively on the SARS-CoV-2 virus. They joined forces to develop the most relevant research model possible for understanding how the virus impacts the lungs, engineering living, “breathing” human lung cells from stem cells for the task.