Among those cases, 17 patients had evidence of inflammation compatible with myositis and 7 patients (4 from the BNT162b2 group, 2 from the ChAdOx1 group, and 1 with the DB15806 vaccine) had evidence of necrosis on muscle biopsy, while 3 cases had anti-SRP autoantibodies, 1 anti-HMGCR, 1 anti-TIFγ, and 1 ANAs (speckled pattern). This evidence concerns the gene HMGCR and myositis disease.