by Kelsey Simpkins, University of Colorado at Boulder Particle size distribution of MHV in saliva when aerosolized at 25% RH (blue) and 60% RH (green) as judged by RNA relative abundance in 11 MOUDI stages. Airborne MHV was aged for 20 minutes at constant RH in the chamber, and RNA was assessed with RT-qPCR. Credit: PNAS Nexus (2022)....