A particular monoclonal antibody that binds to the influenza virus HA molecule inhibits HA-specific thymus-derived lymphocytes mediating cytotoxicity in the context of H-2Dd but not of H-2Kd. Another monoclonal antibody blocks both sets of HA-specific effector T cells. This observation, together with related findings from other laboratories, is considered to support the idea that T cell recognition is directed against some association of viral and H-2 glycoproteins, as proposed in the original formulation of the “altered self” concept.

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This work was supported by United States Public Health Service Grants AI-13989, AI-14162, AI-15412, and NS 11036, and by a grant from the National Multiple Sclerosis Society.

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