Skip directly to page options Skip directly to A-Z link

Volume 29, Number 4—April 2023

Dispatch

Serial Intervals and Incubation Periods of SARS-CoV-2 Omicron and Delta Variants, Singapore

Kangwei Zeng, Santhya Santhya, Aijia Soong, Nitika Malhotra, Dhanushanth Pushparajah, Koh Cheng Thoon, Benny Yeo, Zheng Jie Marc Ho, and Mark Chen I Cheng
Author affiliations: National Centre for Infectious Diseases, Singapore (K. Zeng, Santhya, A. Soong, M. Chen I-Cheng); Ministry of Health, Singapore (K. Zeng, N .Malhotra, D. Pushparajah, Z.J.M. Ho, M.C. I-Cheng); KK Women's and Children’s Hospital, Singapore (K.C. Thoon); National University of Singapore, Singapore (K.C. Thoon); National Technological University, Singapore (K.C. Thoon); National Public Health Laboratory, Singapore (B. Yeo)

Main Article

Figure

Comparative analysis of serial interval of SARS-CoV-2 Delta and Omicron variants, Singapore. A) Incubation period using only transmission pairs with clear epidemiological links and single-day source exposure to primary case. B) Serial interval of all symptomatic transmission pairs. C) Serial interval of all symptomatic transmission pairs with transmissions within households. D) Serial interval of all symptomatic transmission pairs with transmissions outside of households (workplace, social events). Means and 95% CIs are based on fitting a Gamma distribution using the maximum-likelihood method. p values were calculated using Wilcoxon rank-sum test.

Figure. Comparative analysis of serial interval of SARS-CoV-2 Delta and Omicron variants, Singapore. A) Incubation period using only transmission pairs with clear epidemiological links and single-day source exposure to primary case. B) Serial interval of all symptomatic transmission pairs. C) Serial interval of all symptomatic transmission pairs with transmissions within households. D) Serial interval of all symptomatic transmission pairs with transmissions outside of households (workplace, social events). Means and 95% CIs are based on fitting a Gamma distribution using the maximum-likelihood method. p values were calculated using Wilcoxon rank-sum test.

Download

Main Article

Page created: January 18, 2023
Page updated: March 21, 2023
Page reviewed: March 21, 2023
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