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[Specific cytolytic activity of human lymphocytes following vaccination with vaccinia virus and measles virus].

Human peripheral lymphocytes harvested 7 days after vaccination with vaccinia virus or measles virus lyse specifically target cells infected with the corresponding virus. This cytotoxic activity is found in a subpopulation of lymphocytes depleted of T-cells and containing lymphocytes bearing Fc receptor. The activity can also be transferred by supernatant of immune lymphocytes on addition of normal lymphocyte. These results suggest that two types of cell are involved: an antibody-secreting cell providing specific antiviral antibody (B-cells), and an effector cell bearing Fc receptor (K-cells).