Han DH, Su YK, Na ML, et al. - Using medical records in the Health Insurance Review and Assessment Service database, a total of 666,136 medical records of children younger than 6 years who visited the hospital and were diagnosed with febrile seizures from 2009 to 2016 were involved in order to examine trends in febrile seizures and viral infection in Korean children. In May, the total monthly number of individuals was highest (n = 64,969), and plateaus were created from April to July. In October, the least individuals were observed (n = 34,424). Influenza in April and enterovirus during May–July were the most prevalent viral pathogens. Hence, from late spring to summer, the seasonal distribution of febrile seizures was high, and the influenza virus and enterovirus were most commonly correlated.