About the Authors

Lena Erlandsson

lao@ssi.dk

Affiliation Virus Research and Development, Department of Virology, Statens Serum Institut, Copenhagen, Denmark

Lars Peter Nielsen

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

Anders Fomsgaard

Affiliation Virus Research and Development, Department of Virology, Statens Serum Institut, Copenhagen, Denmark

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: LE LPN AF. Performed the experiments: LE. Analyzed the data: LE. Contributed reagents/materials/analysis tools: LE AF. Wrote the paper: LE LPN AF.