Professor Mark Hernandez, S. J. Archuleta Professor of Civil and Environmental Engineering, also directs SMµ÷½ÌËù Boulder's Environmental Engineering Microbiology and Disinfection Lab, an experimental space used to study infectious airborne particles and realistically mimics indoor environments. In a recent study published in PNAS-Nexus, the team studied murine hepatitis virus (MHV), a coronavirus that cannot infect humans but is closely related to SARS-CoV-2.