Skip directly to site content Skip directly to page options Skip directly to A-Z link Skip directly to A-Z link Skip directly to A-Z link
Volume 30, Number 2—February 2024
Dispatch

Inferring Incidence of Unreported SARS-CoV-2 Infections Using Seroprevalence of Open Reading Frame 8 Antigen, Hong Kong

Shi Zhao1, Chris Ka Pun Mok1, Yun Sang Tang, Chunke Chen, Yuanxin Sun, Ka Chun ChongComments to Author , and David S.C. Hui
Author affiliation: Author affiliations: School of Public Health, Tianjin Medical University, Tianjin, China (S. Zhao); JC School of Public Health and Primary Care, Chinese University of Hong Kong, Hong Kong, China (S. Zhao, C.K.P. Mok, Y.S. Tang, C. Chen, Y. Sun, K.C. Chong); Centre for Health Systems and Policy Research, Chinese University of Hong Kong, Hong Kong, China (S. Zhao, K.C. Chong); CUHK Shenzhen Research Institute, Shenzhen, China (S. Zhao, K.C. Chong); Li Ka Shing Institute of Health Sciences, Chinese University of Hong Kong, Hong Kong, China (C.K.P. Mok, Y.S. Tang, C. Chen, Y. Sun); S.H. Ho Research Centre for Infectious Diseases, Chinese University of Hong Kong, Hong Kong, China (C.K.P. Mok, D.S.C. Hui)

Main Article

Figure

Reported SARS-COV-2 incidence versus estimates based on open reading frame 8 antigen testing, Hong Kong, China, January 1–June 20, 2022. A) Daily numbers and incidence of all reported infections and estimated asymptomatic infections by test type and presence or absence of symptoms. B) Estimated infection attack rate; shading indicates 95% credible intervals (CrIs). C) Estimated time-varying R for reported cases compared with estimated cases. Green vertical dashed lines indicate date (February 26, 2022) when compulsory reporting of positive RAT results was implemented in Hong Kong. Because of the large number of cases, 95% CrIs for R were extremely narrow, and thus we omitted CrIs in panel C. R, reproduction number; RAT, rapid antigen test.

Figure. Reported SARS-COV-2 incidence versus estimates based on open reading frame 8 antigen testing, Hong Kong, China, January 1–June 20, 2022. A) Daily numbers and incidence of all reported infections and estimated asymptomatic infections by test type and presence or absence of symptoms. B) Estimated infection attack rate; shading indicates 95% credible intervals (CrIs). C) Estimated time-varying R for reported cases compared with estimated cases. Green vertical dashed lines indicate date (February 26, 2022) when compulsory reporting of positive RAT results was implemented in Hong Kong. Because of the large number of cases, 95% CrIs for R were extremely narrow, and thus we omitted CrIs in panel C. R, reproduction number; RAT, rapid antigen test.

Main Article

1These authors contributed equally to the article.

Page created: November 30, 2023
Page updated: January 24, 2024
Page reviewed: January 24, 2024
The conclusions, findings, and opinions expressed by authors contributing to this journal do not necessarily reflect the official position of the U.S. Department of Health and Human Services, the Public Health Service, the Centers for Disease Control and Prevention, or the authors' affiliated institutions. Use of trade names is for identification only and does not imply endorsement by any of the groups named above.
file_external