%0 Journal Article %A Suarez Castillo, Milena %A Khaoua, Hamid %A Courtejoie, NoƩmie %T Vaccine-induced and naturally-acquired protection against Omicron and Delta symptomatic infection and severe COVID-19 outcomes, France, December 2021 to January 2022 %D 2022 %J Eurosurveillance %V 27 %N 16 %P 2200250 %R doi:https://doi.org/10.2807/1560-7917.ES.2022.27.16.2200250 %K vaccination effectiveness %K SARS-CoV-2 %K Test negative design %K immunity %U https://www.eurosurveillance.org/content/10.2807/1560-7917.ES.2022.27.16.2200250