COVID-19 vaccine effectiveness against SARS-CoV-2 infection during the Delta period, a nationwide study adjusting for chance of exposure, the Netherlands, July to December 2021 
van Ewijk, Catharina E and Kooijman, Marjolein N and Fanoy, Ewout and Raven, Stijn FH and Middeldorp, Marit and Shah, Anita and de Gier, Brechje and de Melker, Hester E and Hahné, Susan JM and Knol, Mirjam J, Eurosurveillance, 27, 2200217 (2022), https://doi.org/10.2807/1560-7917.ES.2022.27.45.2200217