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In 145 patients, revaccination was performed with the culprit vaccine, which was well tolerated in 126 of the patients, and 15 of the patients had an alternative COVID-19 vaccine (other mRNA vaccine for 12), which was well tolerated in 13 of the patients (Figure 1). Keywords: allergy; anaphylaxis; COVID-19-mRNA vaccines EN allergy anaphylaxis COVID-19-mRNA vaccines 2320 2323 4 08/02/23 20230801 NES 230801 To the Editor, The mechanisms of allergic reactions to COVID-19-mRNA vaccines have not been elucidated. One hundred and sixty patients (84%) were revaccinated (122 under antihistamine premedication), 139 patients (87%) had good tolerance, and 30 patients refused further COVID-19 vaccination. [Extracted from the article]

The article focuses on the gadolinium-based contrast agents (GBCA) around the rate of hypersensitivity reaction (HS). It discusses the aim of evaluating the skin tests and intravenous provocation test (IPT), how skin prick tests (PTs) were performed and then intradermal tests were performed if negative.