CD46 and Febrile seizure (within the age range of 3 months to 6 years): A particularly interesting aspect of this study was the identification of two variants, one in the interferon-induced gene IFI44L and the other in the measles virus receptor CD46, which are each specific for risk for febrile seizures after the MMR vaccine, suggesting that we may someday be able to identify a subset of children at risk for vaccine-related febrile seizures.