1 CBG-MEB, Graadt van Roggenweg 500, 3531 AH Utrecht, the Netherlands; RIVM, Antonie van Leeuwenhoeklaan 9, 3721 MA Bilthoven, the Netherlands; Division of Immunology, Department of Infectious Diseases and Immunology, Utrecht University, Yalelaan 1, 3584 CL Utrecht, the Netherlands.
2 CBG-MEB, Graadt van Roggenweg 500, 3531 AH Utrecht, the Netherlands.
3 RIVM, Antonie van Leeuwenhoeklaan 9, 3721 MA Bilthoven, the Netherlands.
4 Intravacc, Antonie van Leeuwenhoeklaan 9, 3721 MA Bilthoven, the Netherlands.
5 CBG-MEB, Graadt van Roggenweg 500, 3531 AH Utrecht, the Netherlands. Electronic address: [email protected].