About the Authors

Heta Nieminen

Roles Conceptualization, Data curation, Formal analysis, Investigation, Project administration, Supervision, Visualization, Writing – original draft

heta.nieminen@thl.fi

Affiliation Department of Public Health and Welfare, Finnish Institute for Health and Welfare, Tampere, Finland

Tuovi Hakulinen

Roles Conceptualization, Writing – review & editing

Affiliation Department of Public Health and Welfare, Finnish Institute for Health and Welfare, Helsinki, Finland

Taneli Puumalainen

Roles Conceptualization, Funding acquisition, Writing – review & editing

Affiliation Department for Safety, Security and Health, Ministry of Social Affairs and Health, Helsinki, Finland

Päivi Sirén

Roles Conceptualization, Investigation, Supervision, Writing – review & editing

Affiliation Department of Public Health and Welfare, Finnish Institute for Health and Welfare, Tampere, Finland

Arto A. Palmu

Roles Conceptualization, Investigation, Methodology, Project administration, Supervision, Writing – review & editing

Affiliation Department of Public Health and Welfare, Finnish Institute for Health and Welfare, Tampere, Finland

Competing Interests

All authors were THL employees at the time of study conduct. THL has received research funding from GSK, Pfizer, Sanofi Pasteur and Merck for conduction for vaccine-related studies. There are no competing interests related to employment, consultancy, patents, products in development, or marketed products. For this study THL got funding from GSK. Any of the commercial sources do not alter our adherence to PLOS ONE policies on sharing data and materials.