Increased risk of infection with SARS-CoV-2 Omicron BA.1 compared with Delta in vaccinated and previously infected individuals, the Netherlands, 22 November 2021 to 19 January 2022

Eggink, DAndeweg, SPVennema, HVan Maarseveen, Nvan Gageldonk-Lafeber, ABvan den Hof, SReusken, CBEMKnol, MJal., et2025-03-312025-03-3120223508660910.2807/1560-7917.ES.2022.27.4.2101196https://rivm.openrepository.com/handle/10029/653989Increased risk of infection with SARS-CoV-2 Omicron BA.1 compared with Delta in vaccinated and previously infected individuals, the Netherlands, 22 November 2021 to 19 January 2022ArticleEuro Surveill 2022; 27(4):pii.21011962025-03-31