Similarly, a variant (rs1333973) affecting the exclusion of exon 2 of the antiviral gene IFI44L (modified protein, Student’s test; psQTL < 1.1 × 10−56, R2 = 0.72, SPIDEX’s Z = 3.9) is associated with measles-specific humoral immunity and increased risk of febrile seizures49,50. This evidence concerns the gene IFI44L and measles.