Original Article Y. Li Corresponding Author E-mail address: liyg@hku.hk Department of Mechanical Engineering, The University of Hong Kong, Hong Kong SAR, China Correspondence Yuguo Li, Department of Mechanical Engineering, The University of Hong Kong, Hong Kong SAR, China. Email: liyg@hku.hk Search for more papers by this author Abstract The occurrence of close proximity infection for many respiratory diseases is often cited as evidence of large droplet and/or close contact transmission.
