IL6 and influenza: In this study, CRP ≥ 7.57 mg/L, IL-6 ≥ 9.84 pg/ml, Days from onset of Flu symptoms to hospitalization ≤4.5 days, CSF-TP ≥ 194.8 mg/L, and FluA were found to be independent risk factors for severe influenza combined with febrile seizures.