Clinical Trial: Study on the Long-Term Persistence of Immunity Induced by Inactivated Hepatitis A Vaccine

U.S., Oct. 23 -- ClinicalTrials.gov registry received information related to the study (NCT07889219) titled 'Study on the Long-Term Persistence of Immunity Induced by Inactivated Hepatitis A Vaccine' on Oct. 15.

Brief Summary: This study is a single-center, open-label, controlled study. Its primary objective is to evaluate the 20-year persistence of immunity induced by the inactivated hepatitis A vaccine. At least 106 healthy participants aged 21-28 years will be enrolled. Participants will be selected from individuals who completed the full vaccination course in the PRO-HA-4006 clinical study (Three-Batch Consistency Study of Healive(R) in Healthy Children Aged 1-8 Years in Changzhou) . After voluntarily providing informed consent, each p...