BTG3 and systemic lupus erythematosus: As for systemic autoimmunity, acute B19V infection can transiently mimic full-blown SLE (facial rash, photosensitivity, acute polyarthritis, cytopenia) [114] or even trigger or exacerbate full SLE [115,116] and can be accompanied by a broad spectrum of autoantibodies, including antinuclear antigen antibodies (ANA), anti-dsDNA, rheumatoid factor and APL antibodies [115,117,118].