• J. Korean Med. Sci. · Feb 2024

    Establishment of Safety Monitoring System for Vaccines Not Included in the National Immunization Program in Korea.

    • Eliel Nham, Jin Gu Yoon, Min Joo Choi, Yu Bin Seo, Jacob Lee, Won Suk Choi, Hakjun Hyun, Hye Seong, Ji Yun Noh, Joon Young Song, Woo Joo Kim, and Hee Jin Cheong.
    • Division of Infectious Diseases, Department of Internal Medicine, Korea University College of Medicine, Seoul, Korea.
    • J. Korean Med. Sci. 2024 Feb 5; 39 (5): e45e45.

    BackgroundIn Korea, there are no surveillance programs for vaccines that are not included in the national immunization program (NIP), and vaccine safety monitoring in the adult population is inadequate. This study aimed to establish a safety monitoring system for non-NIP vaccines in adults.MethodsFrequently administered non-NIP vaccines were selected. Individuals were included if they received at least one of the selected vaccines at a participating institution and provided informed consent. Solicited and unsolicited adverse events were monitored using questionnaires sent through text messages on days 1, 3, 7, 28, and 90 post-vaccination. Selected adverse events of special interest (AESIs) were monitored monthly by retrospective review of electronic medical records. Causality was assessed according to the Korea Disease Control and Prevention Agency guidelines.ResultsFour vaccines (tetanus-diphtheria-pertussis [Tdap], pneumococcal conjugate 13-valent [PCV13], live zoster vaccine [ZVL], and recombinant zoster vaccine [RZV]) were selected, and their safety profiles were monitored at four tertiary hospitals and 10 primary care clinics. The response rates of the questionnaires on post-vaccination days 1, 7, 28, and 90 were 99.2%, 93.6%, 81.0%, and 48.7%, respectively. Of 555 AESI identified over 10 months, 10 cases received one of the selected non-NIP vaccines within 90 days of the event.ConclusionWe are establishing the first safety monitoring system for selected non-NIP vaccines in Korea since September 2022 and report its progress as of July 2023. However, continuous government support is essential for its maintenance and improvement.© 2024 The Korean Academy of Medical Sciences.

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