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Volume 28, Number 8—August 2022
Dispatch

Serial Intervals for SARS-CoV-2 Omicron and Delta Variants, Belgium, November 19–December 31, 2021

Cécile Kremer1Comments to Author , Toon Braeye1, Kristiaan Proesmans, Emmanuel André, Andrea Torneri, and Niel Hens
Author affiliations: Hasselt University, Hasselt, Belgium (C. Kremer, A. Torneri, N. Hens); Sciensano, Brussels, Belgium (T. Braeye, K. Proesmans); Katholieke Universiteit Leuven, Leuven, Belgium (E. André); University Hospitals Leuven, Leuven (E. André); University of Antwerp, Antwerp, Belgium (N. Hens)

Main Article

Table

Estimated parameters of a normal distribution for the serial interval of SARS-CoV-2 Omicron and Delta variants, by different stratifications, Belgium, November 19–December 31, 2021*

Variant Stratification No. transmission pairs Posterior median (95% CrI) SD (95% CrI)
Omicron None 2,161 2.75 (2.65–2.86) 2.54 (2.46–2.61)
Delta
None
334
3.00 (2.73–3.26)
2.49 (2.31–2.69)
Omicron Within-household 1,412 2.80 (2.67–2.93) 2.60 (2.50–2.70)
Delta
Within-household
278
3.04 (2.75–3.33)
2.43 (2.24–2.65)
Omicron Between-household 672 2.72 (2.53–2.90) 2.44 (2.31–2.57)
Delta
Between-household
50
2.78 (2.00–3.56)
2.78 (2.30–3.45)
Omicron Both unvaccinated 346 2.69 (2.40–2.98) 2.75 (2.55–2.96)
Delta
Both unvaccinated
61
2.54 (1.96–3.12)
2.29 (1.93–2.78)
Omicron Both vaccinated 774 2.63 (2.46–2.81) 2.45 (2.33–2.58)
Delta
Both vaccinated
97
3.38 (2.89–3.88)
2.47 (2.16–2.86)
Omicron Both vaccinated + booster 47 3.34 (2.58–4.10) 2.59 (2.13–3.24)
Delta Both vaccinated + booster 0 NA NA

*No Delta transmission pairs in which both case-patients had received a booster vaccine were reported. CrI, credible interval; NA, not available

Main Article

1These first authors contributed equally to this article.

Page created: June 08, 2022
Page updated: July 20, 2022
Page reviewed: July 20, 2022
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