TLR3 and tick-borne encephalitis: In the overall combined cohort of TBE cases (n = 349), CSF cell count, homozygous CCR5Δ32 genotype, Δ32 allele, homozygous wild type, homozygous mutant TLR3 rs3775291 genotype and wt allele did not correlate with the severity of TBE.