Blood tests performed 91 days after PVP-I gargling discontinuation still indicated T3 thyrotoxicosis persistence with TSH, 0.01 μIU/mL; FT3, 4.9 pg/mL; FT4, 1.1 ng/dL; antithyroid-stimulating hormone receptor antibody (third generation) < 0.8 (reference range < 2.0); thyroglobulin, 32.1 ng/mL (reference range ≦ 32.70 ng/mL); anti-TPO antibody < 9.0 (reference range < 16.0); and anti-TG antibody, 10.1 (reference range < 28.0). This evidence concerns the gene TG and thyrotoxicosis.