CD40LG and tick-borne encephalitis: Based on the definition criteria of the European Centre for Disease Control (ECDC) Meeting Report in 2011, TBE was confirmed in 32 cases (by detection of TBEV-specific IgM and IgG antibodies in the serum 29×, or by the IgM in the CSF–3×) and was probable in 4 patients (detection of TBEV-specific IgM antibodies in a unique serum sample) [13].