Direct and indirect vaccination effects on SARS-CoV-2 infection in day-care centres: evaluating the policy for early vaccination of day-care staff in Germany, 2021

To mitigate the known high transmission risk in day-care facilities for children aged 0-6 years, day-care staff were given priority for SARS-CoV-2 vaccination in Rhineland-Palatinate, Germany, in March 2021. This study assessed direct and indirect effects of early vaccination of day-care staff on SA...

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Main Authors: Schoeps, Anja (Author) , Walter, Jan (Author) , Vogt, Manfred (Author) , Bent, Stefan (Author) , Zanger, Philipp (Author)
Format: Article (Journal)
Language:English
Published: 04 May 2023
In: Epidemiology and infection
Year: 2023, Volume: 151, Pages: 1-4
ISSN:1469-4409
DOI:10.1017/S0950268823000638
Online Access:Verlag, kostenfrei, Volltext: https://doi.org/10.1017/S0950268823000638
Verlag, kostenfrei, Volltext: https://www.cambridge.org/core/journals/epidemiology-and-infection/article/direct-and-indirect-vaccination-effects-on-sarscov2-infection-in-daycare-centres-evaluating-the-policy-for-early-vaccination-of-daycare-staff-in-germany-2021/72B4D2BEC7354CEBDA4697950D66F350
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Author Notes:Anja Schoeps, Jan Walter, Manfred Vogt, Stefan Bent, Philipp Zanger and the Palatina Public Health Study Group

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520 |a To mitigate the known high transmission risk in day-care facilities for children aged 0-6 years, day-care staff were given priority for SARS-CoV-2 vaccination in Rhineland-Palatinate, Germany, in March 2021. This study assessed direct and indirect effects of early vaccination of day-care staff on SARS-CoV-2 transmission in daycares with the aim to provide a basis for the prioritisation of scarce vaccines in the future. Data came from statutory infectious disease notifications in educational institutions and from in-depth investigations by the district public health authorities. Using interrupted time series analyses, we measured the effect of mRNA-based vaccination of day-care staff on SARS-CoV-2 infections and transmission. Among 566 index cases from day-care centres, the mean number of secondary SARS-CoV-2 infections per index case dropped by −0.60 case per month after March 2021. The proportion of staff among all cases reported from daycares was around 60% in the pre-interruption phase and significantly decreased by 27 percentage points immediately in March 2021 and by further 6 percentage points each month in the post-interruption phase. Early vaccination of day-care staff reduced SARS-CoV-2 cases in the overall day-care setting and thus also protected unvaccinated children. This should inform future decisions on vaccination prioritisation. 
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