Preparedness for containing COVID-19 outbreak in mass religious gathering with non-pharmaceutical interventions (NPIs)

Chen Yang Hsu, Ya Mei Chen, Chiu Wen Su, Mei Sheng Ku, Yeol Kim, Tim Jensen, Dih Ling Luh*

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Background: The COVID-19 outbreaks associated with mass religious gatherings which have the potential of invoking epidemics at large scale have been a great concern. This study aimed to evaluate the risk of outbreak in mass religious gathering and further to assess the preparedness of non-pharmaceutical interventions (NPIs) for preventing COVID-19 outbreak in this context. Methods: The risk of COVID-19 outbreak in mass religious gathering was evaluated by using secondary COVID-19 cases and reproductive numbers. The preparedness of a series of NPIs for preventing COVID-19 outbreak in mass religious gathering was then assessed by using a density-dependent model. This approach was first illustrated by the Mazu Pilgrimage in Taiwan and validated by using the COVID-19 outbreak in the Shincheonji Church of Jesus (SCJ) religious gathering in South Korea. Results: Through the strict implementation of 80% NPIs in the Mazu Pilgrimage, the number of secondary cases can be substantially reduced from 1508 (95% CI: 900–2176) to 294 (95% CI: 169–420) with the reproductive number (R) significantly below one (0.54, 95% CI: 0.31–0.78), indicating an effective containment of outbreak. The expected number of secondary COVID-19 cases in the SCJ gathering was estimated as 232 (basic reproductive number (R0) = 6.02) and 579 (R0 = 2.50) for the first and second outbreak, respectively, with a total expected cases (833) close to the observed data on high infection of COVID-19 cases (887, R0 = 3.00). Conclusion: We provided the evidence on the preparedness of NPIs for preventing COVID-19 outbreak in the context of mass religious gathering by using a density-dependent model.

OriginalsprogEngelsk
TidsskriftJournal of the Formosan Medical Association
Vol/bind129
Udgave nummerSuppl. 1
Sider (fra-til) S57-S68
ISSN0929-6646
DOI
StatusUdgivet - jun. 2021

Bibliografisk note

Funding Information:
Ministry of Science and Technology, Taiwan (MOST 109-2327-B-002-009).

Publisher Copyright:
© 2021

COVID-19 Pandemic: Challenges and Opportunities
Edited by Hsiu-Hsi Chen, Li-Min Huang
Volume 120, Supplement 1,
Pages E1-E12, S1-S118 (June 2021)

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