1 Department of Microbiology and Immunology, University of Melbourne, Peter Doherty Institute of Infection and Immunity, Melbourne, VIC 3000, Australia.
2 Department of Microbiology and Immunology, University of Melbourne, Peter Doherty Institute of Infection and Immunity, Melbourne, VIC 3000, Australia; Vaccine Product Development, CSL Seqirus, Parkville, VIC, Australia.
3 Department of Microbiology and Center for Vaccine Research, Pandemic Preparedness, and Department of Pathology, Molecular and Cell-Based Medicine, Icahn School of Medicine at Mount Sinai, New York, NY, USA. Electronic address: florian.krammer@mssm.edu.