HLA-A and tropical spastic paraparesis: Associations have indeed been found between specific HLA types and the proviral load (e.g., HLA-A*02), HAM/TSP (e.g., HLA-DRB1*0101), and ATLL (e.g., HLA-A*26) (Jeffery et al., 1999; Sonoda et al., 2011; Assone et al., 2016).