Physical characteristics of close contact and their roles in exposure to exhaled droplets between two people

Professor Li, Yuguo   (Principal Investigator (PI))

Professor Yen Hui-Ling   (Co-Investigator)

Professor Cowling Benjamin John   (Co-Investigator)

Dr Liu Li   (Co-Investigator)

36

2020-01-01

2022-12-31

748300

Physical characteristics of close contact and their roles in exposure to exhaled droplets between two people

body thermal plume, expiratory flows, fomite route, large droplet, short-range airborne

Building and ConstructionThermal

Engineering (E)

17202719

General Research Fund (GRF)

2019

Completed

1) To obtain new data and characteristics of close contact behavior in a student office, including conversation (using sound intensity) and body/head movements. Note: no change; 2) To study the proximity effect on exposure due to the immediate surfaces and short-range airborne subroutes as compared to the large droplet exposure, as affected by head/body movement. Note: no change; 3) To analyze the relative effectiveness of intervention methods to prevent exposure such as surgical masks, N95 masks, hand hygiene, oral hygiene, and personalized ventilation. Note: the original objective was not specific as commented by one reviewer. Not meant to be a detailed study of each intervention, but an analysis of their relative effectiveness.