About the Authors

Susanne P. Stoof

susanne.stoof@rivm.nl (SPS) (SS); guy.berbers@rivm.nl (GAMB) (GB)

Affiliations Centre for Infectious Disease Control, National Institute of Public Health and the Environment (RIVM), Bilthoven, The Netherlands, Department of Immunology and Infectious Diseases, Wilhelmina Children's Hospital, University Medical Center, Utrecht, The Netherlands

Fiona R. M. van der Klis

Affiliation Centre for Infectious Disease Control, National Institute of Public Health and the Environment (RIVM), Bilthoven, The Netherlands

Debbie M. van Rooijen

Affiliation Centre for Infectious Disease Control, National Institute of Public Health and the Environment (RIVM), Bilthoven, The Netherlands

Mirjam J. Knol

Affiliation Centre for Infectious Disease Control, National Institute of Public Health and the Environment (RIVM), Bilthoven, The Netherlands

Elisabeth A. M. Sanders

Affiliation Department of Immunology and Infectious Diseases, Wilhelmina Children's Hospital, University Medical Center, Utrecht, The Netherlands

Guy A. M. Berbers

susanne.stoof@rivm.nl (SPS) (SS); guy.berbers@rivm.nl (GAMB) (GB)

Affiliation Centre for Infectious Disease Control, National Institute of Public Health and the Environment (RIVM), Bilthoven, The Netherlands

Competing Interests

EAMS declares to have received unrestricted research support from Pfizer, grant support for vaccine studies from Pfizer and GSK and fees paid to the institution for advisory boards or participation in independent data monitoring committees for Pfizer and GSK. None of these activities are related to the present study. For this study Baxter provided the vaccines. There are no patents, products in development or marketed products to declare. This does not alter the authors' adherence to all the PLOS ONE policies on sharing data and materials, as detailed online in the guide for authors.

Author Contributions

Conceived and designed the experiments: SPS FRMvdK DMvR EAMS GAMB. Performed the experiments: SPS DMvR. Analyzed the data: SPS MJK. Wrote the paper: SPS FRMvdK DMvR MJK EAMS GAMB.