Impact of Comorbidities and Skin Diseases on Post-Vaccination Reactions: A Study on COVID-19 Vaccinations in Poland.

Significant differences in the frequency of AEFI, depending on the vaccine type were identified, with an overall trend showing a reduction in adverse events with subsequent doses, especially in the case of the Moderna vaccine. mRNA vaccines, such as Moderna and Pfizer, represent a new generation of vaccine technology, which may explain the slower adaptation of the body, particularly after the initial dose.

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