SOVIET SEARCH FOR VIRUSES THAT CAUSE CHRONIC NEUROLOGIC DISEASES IN THE U.S.S.R.
D000690:Amyotrophic Lateral Sclerosis; D004660:Encephalitis; D004671:Encephalitis, Arbovirus; D004813:Epidemiology; D006801:Humans; D009103:Multiple Sclerosis; D009422:Nervous System Diseases; D014586:USSR; D014777:Virus Diseases; D014780:Viruses
AMYOTROPHIC LATERAL SCLEROSIS; ENCEPHALITIS, EPIDEMIC; EPIDEMIOLOGY; MULTIPLE SCLEROSIS; NERVOUS SYSTEM DISEASES; REVIEW; USSR; VIRUS DISEASES