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← Human Body & HealthWhy does rheumatoid arthritis flare up after certain infections?
A)Direct viral synovial membrane invasion
B)Molecular mimicry triggers autoimmunity✓
C)Antibiotic resistance causes immune stimulation
D)Complement pathway directly destroys cartilage
💡 Explanation
Rheumatoid arthritis flares can occur due to molecular mimicry, where antibodies produced against a pathogen cross-react with joint tissues, because the pathogen's antigens resemble self-antigens. Therefore, the immune system attacks the joints, rather than solely targeting the infection.
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