A 19-year-old female in prior good health was brought to the Emergency Department because of a tonic-clonic seizure of about 2-3 minutes followed by confusion for 15 minutes. A throat swab test confirmed influenza B infection, also consistent with an ongoing influenza outbreak. Physical exam was normal. Results of EEG, CSF and neuroimaging are described in Table 1. Complete blood counts and blood chemistries were within the normal range except for an increased serum C reactive protein value of 17.4 mg/L (normal < 5 mg/L). She was discharged without medication and seizures did not recur in 18 months. She denied prior seizures, febrile seizures, head trauma, stroke, or family history of seizures.