About the Authors

Arto A. Palmu

arto.palmu@thl.fi

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

Hanna Rinta-Kokko

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

Hanna Nohynek

Affiliation Department of Health Security, National Institute for Health and Welfare, Helsinki, Finland

J. Pekka Nuorti

Affiliation Department of Health Security, National Institute for Health and Welfare, Helsinki, Finland

Terhi M. Kilpi

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

Jukka Jokinen

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

Competing Interests

The authors are employees of the National Institute for Health and Welfare, which has received research funding from GlaxoSmithKline for a Nationwide effectiveness trial of the ten-valent pneumococcal conjugate vaccine. AAP, HRK, TMK, and JJ are coinvestigators in the trial. This does not alter our adherence to PLOS ONE policies on sharing data and materials as GlaxoSmithKline had no role in the current study. The funding received from GlaxoSmithKline was for another trial, not the current study.

Author Contributions

Conceptualization: AAP JJ. Data curation: AAP HR-K JJ. Formal analysis: HR-K JJ. Funding acquisition: TMK JJ. Investigation: AAP HR-K JJ. Methodology: AAP HR-K HN JPN TMK JJ. Project administration: JJ. Resources: TMK JJ. Supervision: TMK JJ. Validation: HR-K JJ. Visualization: AAP HR-K HN JPN TMK JJ. Writing – original draft: AAP. Writing – review & editing: AAP HR-K HN JPN TMK JJ.