IL6 and susceptibility to pneumonia measurement: SFTS patients (vs. healthy controls): elevated: TNF-α, IL-6, and RANTES; decreased: IFN-γ; no difference: TGF-β.Severe cases (vs. non-severe cases): elevated: TNF-α, IP-10, and IFN-γ;no difference: IL-6, TGF-β, and RANTESPneumonia (vs. without pneumonia): elevated: IP-10