The factors required for the generation of memory CD4 T cells remain unclear, and whether there is a continuing requirement for antigen stimulation is critical to design of vaccine strategies. CD4 effectors generated in vitro from naïve CD4 T cells of mice efficiently gave rise to small resting memory cells after transfer to class II-deficient hosts, indicating no requirement for further antigen or class II recognition.
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Swain et al. (1999) studied this question.
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