About the Authors

Markku Nurhonen

markku.nurhonen@thl.fi

Affiliation Department of Vaccination and Immune Protection, National Institute for Health and Welfare, Helsinki, Finland

Kari Auranen

Affiliation Department of Vaccination and Immune Protection, National Institute for Health and Welfare, Helsinki, Finland

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Analyzed the data: MN KA. Wrote the paper: MN KA. Developed the mathematical model: MN KA. Developed the computational approach: MN KA.