OAS1 and hand, foot and mouth disease: The expression level of INFAR1 of rs2843710 genotype GG was lower than those with genotypes CC or CG, and coincided with the same expression pattern of INFAR1 downstream genes OAS1 and MX1, arguing that a tightly regulated type I IFN response to EV71 infection may have contributed to attenuate resistance to HFMD progression in this population.