Clin Exp Emerg Med.  2021 Sep;8(3):153-159. 10.15441/ceem.21.067.

Adverse events and preventive measures related to COVID-19 vaccines

  • 1Department of Emergency Medicine, Inha University School of Medicine, Incheon, Korea


The coronavirus disease 2019 (COVID-19) vaccines are categorized according to the manufacturing technique, including mRNA vaccines and adenovirus vector vaccines. According to previous studies, the reported efficacy of the COVID-19 vaccine is excellent regardless of the type of vaccine, and the majority of studies have shown similar results for safety. Most of the adverse reactions after vaccination were mild or moderate grade, and severe reactions were reported in a very small proportion. However, the adverse reactions that might occur after nationwide vaccinations can contribute to crowding of emergency departments, and this can further lead to significant obstacles to providing necessary treatment for life-threatening conditions. Therefore, as emergency physicians, we would like to present some concerns and suggestions to prevent these predictable problems.


COVID-19; Vaccination; Adverse effects; Emergency service, hospital
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