Related Experiment Video
Updated: Aug 30, 2025

Minimal Erythema Dose MED Testing
Published on: May 28, 2013
Sever erythema multiforme post-COVID-19 moderna vaccine: Case report and literature review
Abdalla Fadul1, El Mustafa Abdalla1, M Musa1
1Department of Internal Medicine, Hamad Medical Corporation, Doha, Qatar.
Introduction:
Although the COVID-19 Vaccine usually causes a few non-serious side effects, serious ones such as Erythema multiforme recently has been linked to it.
Case Presentation:
Our patient presented with severe skin reaction one day post-Covid-19 Moderna vaccine diagnosed as erythema multiforme proven by skin biopsy that responded well to steroids.
Discussion:
Erythema multiform major, an immune-mediated cutaneous reaction to infections or drugs involving the oral cavity, should be considered a possible adverse effect of numerous vaccinations, including SARSCoV2. Correct patient history gathering enables early detection and successful medical therapy with oral corticosteroids.Furthermore, the disease's rarity makes establishing a causative link difficult. However, because we are still learning about the innovative antiSARSCoV2 vaccines, it is crucial to be cautious of the potential cutaneous adverse responses.
Conclusion:
Despite being rare, life-threatening adverse reactions can occur post-COVID-19 Vaccination.
Insights
A severe skin reaction, Erythema multiforme, was diagnosed one day after the COVID-19 Moderna vaccine. This rare but serious adverse event responded well to steroid treatment.
Area of Science:
- Dermatology
- Vaccinology
- Immunology
Background:
- COVID-19 vaccines are associated with various side effects, though serious reactions are rare.
- Erythema multiforme is an immune-mediated skin reaction that can be triggered by infections or drugs.
Related Concept Videos
Myocarditis I: Introduction
Myocarditis III: Medical Management
Myocarditis II: Clinical Features and Diagnostic Tests
Rheumatic Heart Disease II: Clinical Manifestations and Diagnostic Studies
Pericarditis III: Medical Management
Pericarditis I: Introduction

