IL6 and influenza: CRP (x2 = 5.19, OR = 1.04, 95% CI = 1.01–1.07), serum IL-6 (x2 = 4.13, OR = 1.00, 95% CI = 1.00–1.01), days from onset of Flu symptoms to hospitalization (x2 = 21.60, OR = 0.48, 95% CI = 0.35–0.65), CSF-TP (x2 = 7.50, OR = 1.01, 95% CI = 1.01–1.03), and FluA (x2 = 4.51, OR = 4.51, 95% CI = 1.12–18.10) were found to be independent risk factors for severe influenza and febrile seizures in children (P < 0.05) (Table 3).