Cadnum, Jennifer, Heba Alhmidi, and Curtis Donskey. “Planes, Trains, and Automobiles: Use of Carbon Dioxide Monitoring to Assess Ventilation During Travel”. Pathogens and Immunity 7, no. 1 (February 25, 2022): 31–40. Accessed June 26, 2022. https://www.paijournal.com/index.php/paijournal/article/view/495.