Febrile Seizures

The goal of this observational study is to learn about the recurrence and development of epilepsy in children hospitalized with their first febrile seizures. The main questions it aims to answer are: * What is the risk of recurrence after the first febrile seizure and what are the risk factors for recurrent febrile seizures in Vietnamese children? * What is the risk of developing epilepsy later in life and what are the risk factors for developing epilepsy in Vietnamese children who have had febrile seizures?