Autoimmune Manifestations Following COVID-19 Infection: A Systematic Review

Area of Science:

• Immunology
• Infectious Diseases
• Rheumatology

Background:

• COVID-19 is associated with immune dysregulation and autoantibody formation.
• Concerns exist regarding SARS-CoV-2 infection triggering new autoimmune diseases.
• Systematic review of controlled observational evidence is needed.

Purpose of the Study:

• To synthesize evidence on the incidence and risk of autoimmune manifestations after confirmed COVID-19.
• To evaluate the association between SARS-CoV-2 infection and new-onset autoimmune disease.
• To assess the certainty of evidence using GRADE and methodological quality using Newcastle-Ottawa Scale.

Main Methods:

• Systematic review following PRISMA 2020 guidelines.
• Inclusion of original cohort or case-control studies comparing autoimmune disease incidence in individuals with and without COVID-19.
• Narrative synthesis of findings from eight large cohort studies encompassing millions of individuals.

Main Results:

• Confirmed SARS-CoV-2 infection is linked to increased risk of incident autoimmune disease across multiple domains (rheumatological, dermatological, endocrine, etc.).
• Adjusted hazard ratios for autoimmune disease ranged from approximately 1.3 to 3.0.
• Connective tissue, vasculitic, and antibody-mediated disorders were most frequently implicated; risk showed severity dependence and attenuated over time.

Conclusions:

• Confirmed COVID-19 is associated with a modest increased risk of new-onset autoimmune disease.
• The evidence supports clinical vigilance, especially after severe infection.
• Prospective studies are needed to confirm causality and refine understanding of risk factors and protective measures.