ENDURING IMMUNITY FOLLOWING VACCINATION OF MICE WITH FORMALIN-INACTIVATED VIRUS OF RUSSIAN SPRING-SUMMER (FAR EASTERN, TICK-BORNE) ENCEPHALITIS : CORRELATION WITH SERUM-NEUTRALIZING AND COMPLEMENT-FIXING ANTIBODIES.

ENDURING IMMUNITY FOLLOWING VACCINATION OF MICE WITH FORMALIN-INACTIVATED VIRUS OF RUSSIAN SPRING-SUMMER (FAR EASTERN, TICK-BORNE) ENCEPHALITIS : CORRELATION WITH SERUM-NEUTRALIZING AND COMPLEMENT-FIXING ANTIBODIES.