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This Review focuses on our growing understanding of immunological memory behaviour in natural killer (NK) cells. The authors discuss the development and functions of memory NK cells and consider the potential of targeting these populations for vaccination or therapeutic purposes.
The development and maintenance of protective CD8+ T cell memory require help. This is provided by CD4+ T cells in many ways. Here, the authors review the latest insights into this multifaceted role for CD4+T cells, and the implications for vaccine design and T cell-based therapies.