Lymphocytes of 6 patients with infectious mononucleosis were found to be capable of responding in mixed lymphocyte culture (MLC) to Epstein-Barr virus (EBV)--transformed lymphoblastoid cell lines and Raji cells, whereas their response to PWM-induced blasts and non-T cells was significantly depressed. This means that despite the suppression of cellular reactivity, observed in infectious mononucleosis, the specific response to EBV-infected cells remains unaffected.
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