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Self-reported adverse events after 2 doses of COVID-19 vaccine in Korea

In Korea, a national coronavirus disease 2019 (COVID-19) vaccination program was implemented, including 4 vaccines against COVID-19. A text messaging-based survey, in addition to a passive adverse event reporting system, was launched to quickly report unusual symptoms post-vaccination. This study co...

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Bibliographic Details
Published in:Epidemiology and health 2023, 45(0), , pp.006-006
Main Authors: Kwon, Yunhyung, Hwang, Insob, Ko, Mijeong, Kim, Hyungjun, Kim, Seontae, Seo, Soon-Young, Cho, Enhi, Lee, Yeon-Kyeng
Format: Article
Language:English
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Summary:In Korea, a national coronavirus disease 2019 (COVID-19) vaccination program was implemented, including 4 vaccines against COVID-19. A text messaging-based survey, in addition to a passive adverse event reporting system, was launched to quickly report unusual symptoms post-vaccination. This study compared the frequency of adverse events after COVID-19 vaccination based on the vaccine type and the type of 2-dose regimen (homologous or heterologous). Self-reported adverse events were collected through a text-message survey for 7 days after each vaccination. This study included 50,950 vaccine recipients who responded to the survey at least once. Informed consent to receive surveys via text was obtained from the vaccine recipients on the date of first vaccination. The recipients of mRNA vaccines reported local and systemic reactions 1.6 times to 2.8 times more frequently after dose 2 than after dose 1 (p
ISSN:2092-7193
2092-7193
DOI:10.4178/epih.e2023006