Of note, vaccination with ChAdOx1-S/ChAdOx1 nCoV-19 is associated with an increased risk for other antibody-related diseases, such as Guillain–Barre syndrome [39] and platelet factor 4 (PF4) antibody-related vaccine-induced thrombosis and thrombocytopenia (VITT) [10]. This evidence concerns the gene PF4 and deep vein thrombosis.