![Frontiers | The Safety, Immunogenicity, and Immunopersistence of Hepatitis A Vaccine in HBs-Ag-Positive Participants: A Retrospective Study Frontiers | The Safety, Immunogenicity, and Immunopersistence of Hepatitis A Vaccine in HBs-Ag-Positive Participants: A Retrospective Study](https://www.frontiersin.org/files/Articles/672221/fcimb-11-672221-HTML/image_m/fcimb-11-672221-g001.jpg)
Frontiers | The Safety, Immunogenicity, and Immunopersistence of Hepatitis A Vaccine in HBs-Ag-Positive Participants: A Retrospective Study
![Vaccinology : Hepatitis A Vaccine : Hepatitis A Vaccine Introduction : Diseases and Conditions | Pediatric Oncall Vaccinology : Hepatitis A Vaccine : Hepatitis A Vaccine Introduction : Diseases and Conditions | Pediatric Oncall](https://www.pediatriconcall.com/master/bucket-img/174-hepatitis-a-vaccine/hepatitis-a-vaccine-1.jpg)
Vaccinology : Hepatitis A Vaccine : Hepatitis A Vaccine Introduction : Diseases and Conditions | Pediatric Oncall
![Publisher's Platform: Hey, Washington State Health Authorities and Restaurants, make me proud and let's vaccinate against Hepatitis A | Food Safety News Publisher's Platform: Hey, Washington State Health Authorities and Restaurants, make me proud and let's vaccinate against Hepatitis A | Food Safety News](https://www.foodsafetynews.com/files/2019/07/vaccination_1200x680.jpg)