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. 2024 Jan 2;14:47. doi: 10.1038/s41598-023-49210-1

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© The Author(s) 2023

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/.

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(A) Pediatric hospitals in Germany submitting cases of patients hospitalized with COVID-19 to the registry, January 1, 2020–November 30, 2022 (n = 198; DGPI COVID-19 working group). (B) Pediatric cases on general wards and intensive care units, as reported to the COVID-19 Survey, January 1, 2020–November 30, 2022. The relative predominance of different SARS-CoV-2 variants of concern (VOC) in Germany since the beginning of the COVID-19 pandemic has been determined according to VOC data provided by the Robert Koch-Institute (RKI)⁶. According to calendar week (CW), these phases were: Wildtype (CW 1, 2020–CW 8, 2021); Alpha VOC (CW 9–24, 2021); Delta VOC (CW 25–51, 2021; Omicron BA.1 VOC (CW 52, 2021–CW 8, 2022); Omicron BA.2 VOC (CW 9–22, 2022); and Omicron BA.4/BA.5 VOC (CW 23–48, 2022).