Objective: ... This study aimed to analyze patient background characteristics and trends, with a focus on whether adverse events following COVID-19 vaccination were transient or persistent.
Methods: A retrospective study was performed at a single institution in Japan.
Patients: The study cohort included 47 patients who presented with symptoms after COVID-19 vaccination between May 2021 and September 2023. The patients were classified into two groups based on the duration of symptoms: transient group, less than four weeks; persistent group, greater than or equal to four weeks...
Results: ... A variety of symptoms were observed in each of the two groups (Figure 5)....
Discussion: Regarding the age and sex aspects of adverse events following COVID-19 vaccination... [i]n the present study, the proportion of women in their 40s tended to be significantly higher. This finding supports the notion that women in their 40s may be at risk of developing adverse events following COVID-19 vaccination."
Figure 5. Proportions of adverse event symptoms in the transient and persistent groups.
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Hikichi et al. This is an open access article distributed under the terms of the Creative Commons Attribution License CC-BY 4.0., which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.