In this regard, “C-reactive protein increased” was the most frequently reported AEFI within Investigations, “nausea and vomiting symptoms” within Gastrointestinal disorders, “pyrexia” within General disorders and administration site conditions, “left ventricular dysfunction” within Cardiac disorders, “immunoglobulin therapy” within Surgical and medical procedures, “COVID-19” within Infections and infestations, “cough” within Respiratory, thoracic and mediastinal disorders, as well as “Multisystem inflammatory syndrome in children” within Immune system disorders (Table 2). This evidence concerns the gene CRP and immune system disorder.