Hi My Sister's Child Is 3years 1 Month Old She

Hi my sister's child is 3years 1 month old she had febrile seizure on her 13 months. We contact with pediatric doctor and he gave clobazam and p-125. In the age of 2 year 4 month we contact with neurologist and gave Valparin-200 syrup. neurologist advice us this medicine continue 3 years after last attack of febrile seizure. She is ok now during fever. Is febrile seizure totally gone my sister's child ??? Is any risk of death for febrile seizure??