Long-Term Autoimmune Polyarthritis due to COVID-19 Vaccine

Area of Science:

• Immunology
• Rheumatology
• Vaccinology

Background:

• COVID-19 vaccines are crucial for pandemic control, with generally mild side effects.
• Rare autoimmune sequelae post-vaccination, including polyarthritis, require further investigation.
• Long-term rheumatologic outcomes of COVID-19 vaccination are not fully understood.

Observation:

• A previously healthy 41-year-old man developed progressive polyarthritis and systemic symptoms after the Johnson & Johnson COVID-19 vaccine.
• Symptoms included joint swelling, arthralgia, fever, fatigue, and functional decline, worsening after a booster dose.
• Workup revealed elevated inflammatory markers, inflammatory synovial fluid, and pulmonary granulomas.

Findings:

• The patient was diagnosed with vaccine-induced reactive arthritis.
• Initial treatment with corticosteroids provided partial relief.
• Long-term management was initiated with methotrexate.

Implications:

• Clinicians should suspect autoimmune phenomena like reactive polyarthritis following COVID-19 vaccination.
• Early recognition and rheumatology referral are crucial for managing vaccine-associated autoimmune conditions.
• Further research is needed to understand the pathophysiology, risk factors, and prognosis of these rare events.