COVID-19 Infection Risk Calculator

Department: Urban Planning and Design
Research Centre: Sustainable High Density Cities lab;
Active Dates: 2021-2022

This calculator was developed by Dr. Jianxiang Huang and Prof. Phil Jones for stakeholders to estimate the disease transmission risks in a range of indoor environments. The methodologies and underlying formula have been outlined in a recent research paper.

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Related Publications

Buonanno, G., Stabile, L., & Morawska, L. (2020). Estimation of airborne viral emission: Quanta emission rate of SARS-CoV-2 for infection risk assessment. Environment International, 141, 105794. https:// doi:10.1016/j.envint.2020.105794.

EPA. (2011). Exposure Factors Handbook: 2011 Edition. U.S. Environmental Protection Agency. https:// doi:EPA/600/R-090/052F.

Huang, J.; Hao, T.; Liu, X.; Jones, PJ, Ou, C.; Liang, W; Liu, F. (2022) “Airborne Transmission of the Delta Variant of SARS-CoV-2 in an Auditorium,” Building and Environment, Vol. 219, 109212 https://doi.org/10.1016/j.buildenv.2022.109212

Huang, J.; Jones, P.; Zhang, A.; Hou, S.S.; Spengler, J.D. (2021), “Outdoor Airborne Transmission of Coronavirus Among Apartments in High-Density Cities,” Frontiers in Built Environment, Vol. 7, 666923 https://doi.org/10.3389/fbuil.2021.666923

Lendacki, F. R., Teran, R. A., Gretsch, S., Fricchione, M. J., & Kerins, J. L. (2021). COVID-19 Outbreak Among Attendees of an Exercise Facility – Chicago, Illinois, August-September 2020. MMWR Surveillance Summaries, 70(9), 321-325. https:// doi:10.15585/mmwr.mm7009e2.

Li, Y., Qian, H., Hang, J., Chen, X., Cheng, P., Ling, H., Wang, S., Liang, P., Li, J., Xiao, S., Wei, J., Liu, L., Cowling, B. J., & Kang, M. (2021). Probable airborne transmission of SARS-CoV-2 in a poorly ventilated restaurant. Building and Environment, 196. https:// doi:10.1016/j.buildenv.2021.107788.

Wang, Q.; Lung, DC.; Chan, PT.; Jia, W.; Dung, CH.; Miao, T.; Huang, J.; Chen, W.; Wang, Z.; Leung, KM.; Xu, P.; , Lin, Z.; Wong, D.; Tse, H.; Wong, S.; Choi,G. To,K.; Cheng, V.; Yuen, KY.; Li, Y. (2022), “High attack rate in a Tong Lau house outbreak of COVID-19 with subdivided units in Hong Kong,” Interface Focus, Vol. 12 (202), 10063 https://doi.org/10.1098/rsfs.2021.0063

Wells, W. F. (1955). Airborne Contagion and Air Hygiene. An Ecological Study of Droplet Infections. Harvard University Press.

Yang, W., & Shaman, J. (2022). SARS-CoV-2 transmission dynamics in South Africa and epidemiological characteristics of the Omicron variant. Health Sciences. https:// doi:10.1101/2021.12.19.21268073

Enlarge Photo: COVID-19 Infection Risk Calculator 1
UNIVERSITY OF HONG KONG
FACULTY OF ARCHITECTURE