Maternal-Neonatal ReportsHepatitis B Testing Old Tricks for Newborn PlayersAzhar, Zainul MBBS*; Purcell, Rachael MBBS, BmedSc(hons), DTM&H, MPH*; Buttery, Jim MBBS, PhD, FRACP*,†; Doherty, Richard MBBS, FRACP*,†Author Information From the *Department of Paediatric Infection and Immunity, Monash Children’s Hospital †Department of Paediatrics, Monash University, Clayton, Australia. Accepted for publication January 31, 2020. The authors have no conflicts of interest to disclose. Address for correspondence: Rachael Purcell, MBBS, BmedSc(hons), DTM&H, MPH, Department of Paediatric Infection and Immunity, Level 5, Monash Children’s Hospital, Clayton Road, Clayton VIC 3168, Australia. E-mail: firstname.lastname@example.org. The Pediatric Infectious Disease Journal: June 2020 - Volume 39 - Issue 6 - p 560-561 doi: 10.1097/INF.0000000000002621 Buy Metrics Abstract We describe 2 preterm neonates with transient hepatitis B surface (HBs) antigenemia detected after Hepatitis B vaccination. Repeat serology in both cases tested negative for hepatitis B surface antigen, confirming transient HBs antigenemia. The duration of transient HBs antigenemia affirms current literature in the pediatric population. Copyright © 2020 Wolters Kluwer Health, Inc. All rights reserved.