However, in the absence of defective interfering RNAs both induction of and signaling by IFN-α/β are effectively inhibited through the combined activities of the MeV P, C and V proteins [23,24,25,26,27,28,29,30,31,32] with little to no evidence of IFN induction during measles [32,33]. Here, IFNA1 is linked to measles.