1 Influenza Centre, University of Bergen, Bergen, Norway; Department of Microbiology, Haukeland University Hospital, Bergen, Norway. Electronic address: rebecca.cox@uib.no.
2 Broegelemann Research Laboratory, University of Bergen, Bergen, Norway.
3 Department of Microbiology, Icahn School of Medicine at Mount Sinai, New York, NY, USA.
4 Department of Clinical Sciences, University of Bergen, Bergen, Norway; Department of Medicine, Haukeland University Hospital, Bergen, Norway.