Declaration of Competing Interest The authors declare the following financial interests/personal relationships which may be considered as potential competing interests: Raj Kalkeri, Mingzhu Zhu, Shane Cloney-Clark, Joyce S. Plested, Anand Parekh, Drew Gorinson, Rongman Cai, Soham Mahato, Anthony M. Marchese, and Lisa M. Dunkle are the employees and stockholders of Novavax, Inc. Lou Fries serves as a contractor and is a stockholder of Novavax Inc. Pradhipa Ramanathan (P.R.), Lidwina Carissa Aurelia (L.C.A.), Kevin John Selva (K.J.S.), and Amy W. Chung (A.W.C.) are the employees of the Department of Microbiology and Immunology, University of Melbourne, at the Peter Doherty Institute for Infection and Immunity. A.W.C. received grant funding from NHMRC, MRFF, and NIH. P.R., L.C.A., and K.J.S. declare no conflicts/disclosure of information.