STUDY OF THE VIRULENCE OF TICK-BORNE ENCEPHALITIS VIRUS. I. EXPERIMENTALLY OBTAINED LINE OF TICK-BORNE ENCEPHALITIS VIRUS WITH CHANGED PATHOGENICITY FOR YOUNG MICE AND ITS IMMUNOGENICITY.
D004660:Encephalitis; D004668:Encephalitis Viruses; D004669:Encephalitis Viruses, Tick-Borne; D004671:Encephalitis, Arbovirus; D051379:Mice; D012106:Research; D014774:Virulence; D014776:Virus Cultivation
ENCEPHALITIS VIRUSES; ENCEPHALITIS, EPIDEMIC; EXPERIMENTAL LAB STUDY; MICE; VIRUS CULTIVATION