Title: Vaccine Preventable Illness After Blinatumomab Therapy: A Case ReportAuthors: Katie Voelz MD1,2, Anthony Salvatore DO1, Sudarshawn Damodharan DO1,2 & Cathy Lee-Miller MD1,21Department of Pediatrics, University of Wisconsin School of Medicine & Public Health, Madison, WI, USA2Division of Pediatric Hematology, Oncology and Bone Marrow Transplant, University of Wisconsin School of Medicine & Public Health, Madison, WI, USACorrespondence:Cathy Lee-MillerUniversity of Wisconsin School of Medicine & Public Health1111 Highland Ave, WIMR 4105Madison, WI 53705Email: calee4@wisc.eduWord Count: Main Text: 848Manuscript contains 1 TableShort running Title: Vaccine-preventable, ALL, immunotherapyKeywords: Blinatumomab, ALL, vaccination, pediatrics