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This is an early access version, the complete PDF, HTML, and XML versions will be available soon.
Brief Report

Incubation Periods of SARS-CoV-2 Wild-Type, Delta, and Omicron Variants–Dominant Periods in Singapore

by
Edwin Philip Conceicao
1,*,
Yingqi Xu
2,
Sze Ling Chan
2,
Shoon Jin Yee
2,
Yang Yue
2,
Shalvi Arora
3,
Marcus Eng Hock Ong
2,
Jean Xiang Ying Sim
1,4 and
Indumathi Venkatachalam
1,4
1
Infection Prevention Control, Changi General Hospital, Singapore 529889, Singapore
2
Health Services Research Centre, SingHealth, Singapore 168582, Singapore
3
Infection Prevention Epidemiology, Singapore General Hospital, Singapore 169608, Singapore
4
Department of Infectious Diseases, Singapore General Hospital, Singapore 169608, Singapore
*
Author to whom correspondence should be addressed.
COVID 2024, 4(10), 1578-1584; https://doi.org/10.3390/covid4100109
Submission received: 24 July 2024 / Revised: 10 September 2024 / Accepted: 19 September 2024 / Published: 27 September 2024
Versions Notes

Abstract

This study in Singapore analysed the incubation periods of the following SARS-CoV-2 variants: Wuhan-Hu-1, Delta, and Omicron. Three pandemic waves were examined: Wuhan-Hu-1 (January 2020–March 2021), Delta (May–October 2021), and Omicron (January–June 2022). Data from the SingHealth COVID-19 registry, covering patients from 23 January 2020 to 10 June 2022, were used to calculate incubation periods during the three time periods. The study found median incubation periods of 11 days for Wuhan-Hu-1, 3 days for Delta, and 3 days for Omicron (p-value: <0.001). This study highlighted the impact of different containment measures and the importance of robust EMR systems for tracking and managing infectious diseases. Key challenges included accurate contact tracing and IT infrastructure capabilities. The findings support the use of EMR data for future infectious disease preparedness in Singapore.
Keywords: SARS-CoV-2 variants; incubation period; electronic health record SARS-CoV-2 variants; incubation period; electronic health record

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MDPI and ACS Style

Conceicao, E.P.; Xu, Y.; Chan, S.L.; Jin Yee, S.; Yue, Y.; Arora, S.; Ong, M.E.H.; Sim, J.X.Y.; Venkatachalam, I. Incubation Periods of SARS-CoV-2 Wild-Type, Delta, and Omicron Variants–Dominant Periods in Singapore. COVID 2024, 4, 1578-1584. https://doi.org/10.3390/covid4100109

AMA Style

Conceicao EP, Xu Y, Chan SL, Jin Yee S, Yue Y, Arora S, Ong MEH, Sim JXY, Venkatachalam I. Incubation Periods of SARS-CoV-2 Wild-Type, Delta, and Omicron Variants–Dominant Periods in Singapore. COVID. 2024; 4(10):1578-1584. https://doi.org/10.3390/covid4100109

Chicago/Turabian Style

Conceicao, Edwin Philip, Yingqi Xu, Sze Ling Chan, Shoon Jin Yee, Yang Yue, Shalvi Arora, Marcus Eng Hock Ong, Jean Xiang Ying Sim, and Indumathi Venkatachalam. 2024. "Incubation Periods of SARS-CoV-2 Wild-Type, Delta, and Omicron Variants–Dominant Periods in Singapore" COVID 4, no. 10: 1578-1584. https://doi.org/10.3390/covid4100109

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