About the Authors

Kristin G.-I. Mohn

Kristin.Mohn@uib.no (KGIM); Siri.Mjaaland@fhi.no (SM)

Affiliations The Influenza Centre, Department of Clinical Science, University of Bergen, Bergen, Norway, Infectious Diseases Unit, Department of Internal Medicine, Haukeland University Hospital, Bergen, Norway, K.G. Jebsen Centre for Influenza Vaccine Research, Department of Clinical Science, University of Bergen, Bergen, and The Norwegian Institute of Public Health, Oslo, Norway

Rebecca Jane Cox

Affiliations The Influenza Centre, Department of Clinical Science, University of Bergen, Bergen, Norway, Department of Research & Development, Haukeland University Hospital, Bergen, Norway, K.G. Jebsen Centre for Influenza Vaccine Research, Department of Clinical Science, University of Bergen, Bergen, and The Norwegian Institute of Public Health, Oslo, Norway

Gro Tunheim

Affiliations Division of Infectious Disease Control, Department of Bacteriology and Immunology, Norwegian Institute of Public Health, Oslo, Norway, K.G. Jebsen Centre for Influenza Vaccine Research, Department of Clinical Science, University of Bergen, Bergen, and The Norwegian Institute of Public Health, Oslo, Norway

Jan Erik Berdal

Affiliation Department of Infectious Diseases, Akershus University Hospital, Nordbyhagen, Norway

Anna Germundsson Hauge

Affiliations Section for Virology, Department of Laboratory Services, Norwegian Veterinary Institute, Oslo, Norway, Division of Infectious Disease Control, Norwegian Institute of Public Health, Oslo, Norway

Åsne Jul-Larsen

Affiliation The Influenza Centre, Department of Clinical Science, University of Bergen, Bergen, Norway

Norwegian Pandemic Group

Membership of the Norwegian Pandemic Group is listed in the Acknowledgments.

Bjoern Peters

Affiliation Division of Vaccine Discovery, La Jolla Institute for Allergy and Immunology, La Jolla, California, United States of America

Fredrik Oftung

Affiliations Division of Infectious Disease Control, Department of Bacteriology and Immunology, Norwegian Institute of Public Health, Oslo, Norway, K.G. Jebsen Centre for Influenza Vaccine Research, Department of Clinical Science, University of Bergen, Bergen, and The Norwegian Institute of Public Health, Oslo, Norway

Christine Monceyron Jonassen

Contributed equally to this work with: Christine Monceyron Jonassen, Siri Mjaaland

Affiliations Genetic Unit, Department of Multidisciplinary Laboratory Medicine and Medical Biochemistry, Akershus University Hospital, Nordbyhagen, Norway, Genetic Unit, Centre for Laboratory Medicine, Østfold Hospital Trust, Fredrikstad, Norway, Department of Chemistry, Biotechnology and Food Science, Norwegian University of Life Sciences, Ås, Norway

Siri Mjaaland

Contributed equally to this work with: Christine Monceyron Jonassen, Siri Mjaaland

Kristin.Mohn@uib.no (KGIM); Siri.Mjaaland@fhi.no (SM)

Affiliations Division of Infectious Disease Control, Department of Bacteriology and Immunology, Norwegian Institute of Public Health, Oslo, Norway, K.G. Jebsen Centre for Influenza Vaccine Research, Department of Clinical Science, University of Bergen, Bergen, and The Norwegian Institute of Public Health, Oslo, Norway

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: KGIM RJC SM JEB CMJ. Performed the experiments: KGIM RJC AGH ÅJL SM FO GT CMJ JEB. Analyzed the data: KGIM RJC AGH ÅJL SM FO GT CMJ. Contributed reagents/materials/analysis tools: KGIM RJC AGH ÅJL SM FO GT CMJ BP JEB. Wrote the paper: KGIM RJC AGH SM FO GT CMJ ÅJL.