Active Surveillance of Adverse Events Following Influenza Immunization in Jiangsu Province, China: A 2019-2023 Retrospective Study.

ABSTRACT: Background: Influenza vaccines have been administered in Jiangsu Province. This study aimed to conduct a comprehensive retrospective analysis of influenza vaccine safety in the region from 2019 to 2023. Methods: Data were sourced from the Chinese National Adverse Events Following Immunization Information System (CNAEFIS) and Jiangsu Provincial Electronic Immunization Registries System (JSEIRS) systems. A comprehensive retrospective analysis was performed to calculate the incidence rates of adverse events following immunization (AEFI) and to identify potential safety signals through disproportionality analysis. Results: Out of 4,906,905 administered doses, 2080 AEFI cases were reported, yielding an overall incidence rate of 42.39 per 1,000,000 doses. Significantly highe

SUBMITTER: Wang Z 

PROVIDER: S-EPMC12656768 | biostudies-literature | 2025 Nov

REPOSITORIES: biostudies-literature