OBJECTIVE To construct the transgenic mice model expressing tick-borne encephalitis virus(TBEV)NS5protein,so as to provide a platform for the evaluation of RdRp enzyme activity during TBEV infection.METHODS TBEV NS5 transgenic mice were generated by microinjection of the linearization vector of pRP.ExBiEF1α-NS5-IRES-eGFP into FVB/N mouse fertilized eggs,which were then transferred into pseudopregnancy mice to give birth to transgenic founder mice.Subsequently,homozygous transgenic mice with genetic stabilit...