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Volume 29, Number 9—September 2023
Dispatch

Effects of School-Based Preventive Measures on COVID-19 Incidence, Hong Kong, 2022

Tim K. TsangComments to Author , Xiaotong Huang, Min Whui Fong, Can Wang, Eric H.Y. Lau, Peng Wu, and Benjamin J. Cowling
Author affiliations: The University of Hong Kong, Hong Kong, China (T.K. Tsang, X. Huang, M.W. Fong, C. Wang, E.H.Y. Lau, P. Wu, B.J. Cowling); Laboratory of Data Discovery for Health Limited, Hong Kong Science and Technology Park, Hong Kong (T.K. Tsang, E.H.Y. Lau, P. Wu, B.J. Cowling)

Main Article

Figure 2

School-reported data during the 6th COVID-19 wave, Hong Kong, 2022, evaluated in study of effects of school-based preventive measures on COVID-19 incidence. A) Weekly numbers of school-reported cases during the 6th wave, beginning in June 2022. B) Weekly number of schools reporting >1 case during the 6th wave. C) Weekly number of class suspensions (classes with >2 COVID-19 cases) during the 6th wave. Yellow shading indicates school holiday; red shading indicates summer holiday. Pearson correlation coefficient r and 95% CI were calculated for data reported weekly. D) Distribution of 299 suspected school clusters of COVID-19 by size of cluster (no. cases). A school cluster was defined as a school that reported>2 cases within 7 days. Scales for the y-axes in panels A–C differ substantially to underscore patterns but do not permit direct comparisons.

Figure 2. School-reported data during the 6th COVID-19 wave, Hong Kong, 2022, evaluated in study of effects of school-based preventive measures on COVID-19 incidence. A) Weekly numbers of school-reported cases during the 6th wave, beginning in June 2022. B) Weekly number of schools reporting >1 case during the 6th wave. C) Weekly number of class suspensions (classes with >2 COVID-19 cases) during the 6th wave. Yellow shading indicates school holiday; red shading indicates summer holiday. Pearson correlation coefficient r and 95% CI were calculated for data reported weekly. D) Distribution of 299 suspected school clusters of COVID-19 by size of cluster (no. cases). A school cluster was defined as a school that reported>2 cases within 7 days. Scales for the y-axes in panels A–C differ substantially to underscore patterns but do not permit direct comparisons.

Main Article

Page created: July 12, 2023
Page updated: August 20, 2023
Page reviewed: August 20, 2023
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