Osong Public Health and Research Perspectives

Brief Reports

Safety of the bivalent COVID-19 mRNA booster vaccination among persons aged over 18 years in the Republic of Korea: Seok-Kyoung Choi, Seontae Kim, Mijeong Ko, Yeseul Heo, Tae Eun Kim, Yeonkyeong Lee, Juyeon Jang, Eunok Bahng; Osong Public Health Res Perspect. 2024;15(6):542-549. Published online October 29, 2024; DOI: https://doi.org/10.24171/j.phrp.2024.0194

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Graphical Abstract Abstract PDF: Objectives
The aim of this study was to disseminate information about the safety of bivalent coronavirus disease 2019 (COVID-19) mRNA booster vaccines administered to adults in the Republic of Korea.
Methods
Two databases were used to assess the safety of COVID-19 booster doses of Pfizer BA.1, Pfizer BA.4/5, Moderna BA.1, and Moderna BA.4/5 vaccines for adults aged 18 years and older. Adverse events (AEs) were analyzed using data reported to the web-based COVID-19 vaccination management system (CVMS) and a self-reported text-message survey.
Results
Between October 11, 2022 and March 30, 2023, the CVMS received reports of 2,369 (93.7%) non-serious AEs from vaccinated adults, along with 158 (6.3%) serious AEs, which included 5 cases of anaphylaxis and 33 deaths. From October 11, 2022 to January 27, 2023, 40,022 people aged 18 and older responded to a survey conducted via text message. The booster doses were associated with fewer local and systemic AEs compared to the original vaccines. After receiving the bivalent vaccine, the most commonly reported AEs were pain at the injection site, headache, fatigue, and myalgia.
Conclusion
Overall, bivalent vaccines exhibited fewer AEs compared to the original vaccines. The majority of AEs were non-serious, and serious AEs were rare among adults aged 18 years and older following vaccination with the Pfizer and Moderna bivalent vaccines.

JYNNEOS vaccine safety monitoring in the Republic of Korea, 2022: a cross-sectional study: Jaeeun Lee, Seunghyun Lewis Kwon, Jinhee Park, Hyuna Bae, Hyerim Lee, Geun-Yong Kwon; Osong Public Health Res Perspect. 2023;14(5):433-438. Published online October 18, 2023; DOI: https://doi.org/10.24171/j.phrp.2023.0182

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Objectives
With the recent global mpox outbreak, the JYNNEOS vaccine (Modified Vaccinia Ankara-Bavarian Nordic) was developed as a third-generation smallpox vaccine and initially favored for mpox immunization. Vaccine-associated side effects contribute to vaccine hesitancy. Consequently, tracking adverse events post-immunization is crucial for safety management. This study used data from the national active vaccine safety surveillance conducted in Korea from August 25 to November 24, 2022 to detect potential safety signals and adverse events. Methods: Data on health conditions following vaccination were gathered from web-based surveys and reported via active surveillance through the Immunization Registry Information System. This follow-up system functioned via a text message link, surveying adverse events and health conditions beginning on the second day post-vaccination. Information about specific adverse events, including both local and systemic reactions, was collected. Results: The study included 86 healthcare workers who had received at least 1 dose of the JYNNEOS vaccine. Among the respondents, 79.1% reported experiencing at least 1 adverse event, with the majority being local reactions at the injection site. The incidence of adverse events was higher following the first dose (67.9%) than after the second dose (34.4%). The most frequently reported adverse event for both doses was mild pain at the injection site. Conclusion: The study provides crucial information on the safety of the JYNNEOS vaccine, demonstrating that most adverse events were manageable and predominantly localized to the injection site. Nonetheless, additional research is needed on the safety of various vaccine administration techniques and the vaccine’s effects on broader demographics.

Citations

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Adverse Reactions After Intradermal Vaccination With JYNNEOS for Mpox in Korea
So Yun Lim, Yu Mi Jung, Yeonjae Kim, Gayeon Kim, Jaehyun Jeon, BumSik Chin, Min-Kyung Kim
Journal of Korean Medical Science.2024;[Epub] CrossRef
First Nationwide Mpox Vaccination Program in the Republic of Korea: Implications for an Enhanced Public Health Response
Seunghyun Lewis Kwon, Minju Song, Wonkyung Lee, Jeeyeon Shin, Su-Yeon Lee, Sang-Gu Yeo, Minjeong Kim, Sanggyun Jeong, Joonku Park, Dongwoo Lee, Sookyoung Lim
Journal of Korean Medical Science.2024;[Epub] CrossRef
Global perspectives on smallpox vaccine against monkeypox: a comprehensive meta-analysis and systematic review of effectiveness, protection, safety and cross-immunogenicity
Hao Liu, Wenjing Wang, Yang Zhang, Fuchun Wang, Junyi Duan, Tao Huang, Xiaojie Huang, Tong Zhang
Emerging Microbes & Infections.2024;[Epub] CrossRef

Original Article

Prevalence and patterns of adverse events following childhood immunization and the responses of mothers in Ile-Ife, South West Nigeria: a facility-based cross-sectional survey: Olorunfemi Akinbode Ogundele, Funmito Omolola Fehintola, Mubarak Salami, Rahmat Usidebhofoh, Mary Aderemi Abaekere; Osong Public Health Res Perspect. 2023;14(4):291-299. Published online July 27, 2023; DOI: https://doi.org/10.24171/j.phrp.2023.0071

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1 Web of Science
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Graphical Abstract Abstract PDF

Objectives
This study aimed to examine the prevalence and pattern of adverse events following childhood immunization and the responses of mothers in Ile-Ife, South West Nigeria.
Methods
This descriptive cross-sectional study was conducted among 422 mothers of children aged 0 to 24 months attending any of the 3 leading immunization clinics in Ile-Ife, Nigeria. The respondents were selected using the multi-stage sampling technique. Data were collected using a pretested structured interviewer-administered questionnaire and analyzed using IBM SPSS ver. 26.0. The chi-square test was used to test associations, while binary logistic regression was used to determine the predictors of mothers’ responses to adverse events following immunization (AEFIs). A p-value of <0.05 was considered statistically significant.
Results
The mean age of the respondents was 29.99±5.74 years. About 38% of the children had experienced an AEFI. Most mothers believed that the pentavalent vaccine was the most common cause of AEFIs (67.5%). Fever (88.0%) and pain and swelling (76.0%) were the most common AEFIs. More than half of the mothers (53.7%) administered home treatment following an AEFI. Younger mothers (odds ratio [OR], 2.43; 95% confidence interval [CI], 1.20–5.01), mothers who delivered their children at a healthcare facility (OR, 3.24; 95% CI, 1.08–9.69), and mothers who were knowledgeable about reporting AEFIs (OR, 2.53; 95% CI, 1.04–7.70) were most likely to respond appropriately to AEFIs.
Conclusion
The proportion of mothers who responded poorly to AEFIs experienced by their children was significant. Therefore, strategies should be implemented to improve mothers’ knowledge about AEFIs to improve their responses.

Citations

Citations to this article as recorded by

Advancing Immunization in Africa: Overcoming Challenges to Achieve the 2030 Global Immunization Targets
Olalekan Okesanya, Gbolahan Olatunji, Noah Olaleke, Mba Mercy, Ayodele Ilesanmi, Hassan Kayode, Emery Manirambona, Mohamed Ahmed, Bonaventure Ukoaka, Don Lucero-Prisno III
Adolescent Health, Medicine and Therapeutics.2024; Volume 15: 83. CrossRef

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