Immunogenicity of bivalent omicron (BA.1) booster vaccination after different priming regimens in health-care workers in the Netherlands (SWITCH ON): results from the direct boost group of an open-label, multicentre, randomised controlled trial

Ngoc H. Tan, Daryl Geers, Roos S. G. Sablerolles, Wim J. R. Rietdijk, Abraham Goorhuis, Douwe F. Postma, Leo G. Visser, Susanne Bogers, Laura L.A. van Dijk, Lennert Gommers, Leanne P. M. van Leeuwen, Annemarie Boerma, Sander Nijhof, Karel A. van Dort, Marion Koopmans, Virgil A. S. H. Dalm, Melvin Lafeber, Neeltje A. Kootstra, Anke Huckriede, Debbie van Baarle, Luca M. Zaeck, Corine H. GeurtsvanKessel, Rory D. de Vries, P.H.M. van der Kuy