TS1, A TEMPERATURE-SENSITIVE MUTANT OF MOLONEY MURINE LEUKEMIA VIRUS-TB, CAN INFECT BOTH CD4+ AND CD8+ T-CELLS BUT REQUIRES CD4+ T-CELLS IN ORDER TO CAUSE PARALYSIS AND IMMUNODEFICIENCY
PROTECTIVE ROLE OF CYTOTOXIC LYMPHOCYTES AGAINST MURINE LEUKEMIA VIRUS-INDUCED NEUROLOGIC DISEASE AND IMMUNODEFICIENCY IS ENHANCED BY THE PRESENCE OF HELPER T-CELLS