About the Authors

Nandini Sreenivasan

Affiliation Department of Epidemiology Research, Statens Serum Institut, Copenhagen, Denmark

Saima Basit

Affiliation Department of Epidemiology Research, Statens Serum Institut, Copenhagen, Denmark

Jan Wohlfahrt

Affiliation Department of Epidemiology Research, Statens Serum Institut, Copenhagen, Denmark

Björn Pasternak

bjp@ssi.dk

Affiliation Department of Epidemiology Research, Statens Serum Institut, Copenhagen, Denmark

Tina N. Munch

Affiliation Department of Epidemiology Research, Statens Serum Institut, Copenhagen, Denmark

Lars P. Nielsen

Affiliation Department of Virology, Statens Serum Institut, Copenhagen, Denmark

Mads Melbye

Affiliation Department of Epidemiology Research, Statens Serum Institut, Copenhagen, Denmark

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: NS SB JW BP TNM LPN MM. Performed the experiments: NS SB JW. Analyzed the data: NS SB JW BP TNM LPN MM. Contributed reagents/materials/analysis tools: NS SB JW. Wrote the paper: NS SB JW BP TNM LPN MM. Funding: MM.