Genetic variants in the SLC11A1 gene region have been reported to be associated with various infectious [21-29] and chronic immune diseases, such as T1D [30-33], rheumatoid arthritis (RA) [34-37], juvenile RA (also known as juvenile idiopathic arthritis; JIA) [38,39], sarcoidosis [40], inflammatory bowel disease (IBD) [41-45], Kawasaki disease [46] and multiple sclerosis [47]. This evidence concerns the gene SLC11A1 and juvenile idiopathic arthritis.