What is it about?

Vaccine components can be potential triggers to allergic reactions. Although severe reactions are rare, sometimes immediate or delayed hypersensitivity reactions can occur. Some of the new vaccines against severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) contain known allergens like aluminum salt - present in CoronaVac- and polyethylene glycol - present in Pfizer-BioNTech and Moderna. This case presents a possible delayed cutaneous reaction, Erythema Multiforme, after CoronaVac vaccination.

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Why is it important?

Vaccines are the most effective public health measure to control spread of infectious disease. They should not be discouraged since serious complications are not frequent. But closely monitoring them in order to identify adverse reactions is important to elucidation, prevention and treatment of these events.


This was my first publication as a first author and it is having a great impact since Covid is a global concern. I thank the co-authors, especially the one who invited me and encouraged the publication. And I hope this article can contribute, even in a modest way, to a better comprehension of our immune system and its interactions.

Natane Lopes

Read the Original

This page is a summary of: Erythema multiforme after CoronaVac vaccination, Journal of the European Academy of Dermatology and Venereology, July 2021, Wiley,
DOI: 10.1111/jdv.17495.
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