About the Authors

Marianne Berger Rentsch

Affiliation Institut für Viruskrankheiten und Immunprophylaxe, Mittelhäusern, Switzerland

Gert Zimmer

gert.zimmer@ivi.admin.ch

Affiliation Institut für Viruskrankheiten und Immunprophylaxe, Mittelhäusern, Switzerland

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: GZ. Performed the experiments: MBR GZ. Analyzed the data: GZ. Wrote the paper: GZ.