Tracer gas is a suitable surrogate of exhaled droplet nuclei for studying airborne transmission in the built environment

Affiliations

• ¹ Department of Building Environment and Energy, College of Civil Engineering, Hunan University, Changsha, China.
• ² Department of Building Services Engineering, The Hong Kong Polytechnic University, Hong Kong, China.
• ³ School of Mechanical Engineering, Tongji University, Shanghai, China.