1. *Department of Microbiology and Immunology, University of Melbourne, Peter Doherty Institute for Infection and Immunity, Melbourne, Victoria, Australia;
2. †Department of Pathology and Immunology, Washington University School of Medicine, St. Louis, MO;
3. ‡Center for Vaccines and Immunity to Microbial Pathogens, Washington University School of Medicine, St. Louis, MO; and
4. §The Andrew M. and Jane M. Bursky Center for Human Immunology & Immunotherapy Programs, Washington University School of Medicine, St. Louis, MO