Al Ozonoff1, Etsuro Nanishi2, Ofer Levy3. 1. Precision Vaccines Program, Division of Infectious Diseases, Boston Children's Hospital, Boston, MA, USA; Department of Pediatrics, Harvard Medical School, Boston, MA, USA. Electronic address: al.ozonoff@childrens.harvard.edu. 2. Precision Vaccines Program, Division of Infectious Diseases, Boston Children's Hospital, Boston, MA, USA; Department of Pediatrics, Harvard Medical School, Boston, MA, USA. 3. Precision Vaccines Program, Division of Infectious Diseases, Boston Children's Hospital, Boston, MA, USA; Department of Pediatrics, Harvard Medical School, Boston, MA, USA; Broad Institute of MIT and Harvard, Cambridge, MA, USA.