<prompt> Factors that increase risk of recurrence of febrile seizures include all exceptInitial seizure at less than 12 months of agePositive family historyTemperature more than 40degCComplex seizures  <response>: First degree relative with a history of febrile seizures, Age of onset less than 18 months of age, Temperature greater than 104 degrees Fahrenheit 40 degrees Celsius, and. Rapid onset less than one hour between the onset of the fever and occurrence of a seizure Ref Harrison20th edition pg 2134 