1. Department of Microbiology and Immunology, Peter Doherty Institute for Infection and Immunity, The University of Melbourne, Melbourne, Australia
2. Vaccine and Immunisation Research Group (VIRGo), Department of Infectious Diseases, Peter Doherty Institute for Infection and Immunity, the University of Melbourne, Melbourne, Australia
3. Seqirus, Parkville, Australia
4. WHO Collaborating Centre for Reference and Research on Influenza, Melbourne, Australia
5. Murdoch Children's Research Institute, Melbourne, Australia