“…In such subsets, the potential benefit of vaccination should be weighed against its potential risk [138]. In the 2015, Soriano et al supposed that four groups of individuals are at risk: (1) patients with prior postvaccination autoimmune phenomena, such as patients who showed initial clinical manifestations (fever, arthralgia) after dose vaccination; (2) immunosuppressed patients with autoimmune conditions: indeed, live vaccines including BCG, MMR vaccines, and vaccines against herpes zoster, and yellow fever are generally contraindicated in these patients due to the risk of an uncontrolled viral replication [163]; (3) patients with a history of allergic reactions: the vaccine components include potential allergens such as animal-derived proteins like egg (present in yellow fever, influenza, and MMR vaccines), adjuvants like aluminum (present in HPV, HNI, and HBV and vaccines) and thimerosal (HPV vaccine), antibiotics like gentamycin, neomycin, streptomycin, polymyxin B, and stabilizers like gelatin (present in varicella, and MMR vaccines) and lactose; (4) patients who are prone to develop autoimmunity, including patients having a family history of autoimmune diseases; asymptomatic carriers of autoantibodies, such as high levels of anti-citrullinated protein antibodies (ACPA) in RA, anti-mitochondrial antibodies (AMA) in primary biliary cirrhosis, anti-thyroid antibodies in Hashimoto's thyroiditis, and anti-dsDNA in SLE [164]; carrying certain genetic profiles, including patients with polymorphisms associated with the insulin gene, the thyroglobulin gene and the thyroid-stimulating hormone receptor gene [165].…”