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The author discusses the paper by C. Stemberger and colleagues entitled, "Lowest numbers of primary CD8+ T cells can reconstitute protective immunity upon adoptive immunotherapy." He mentions that the researchers demonstrated that CD62Lhi antigen-specific T cells are more persistent than more differentiated CD62Llo cells. He suggests the efforts of the researchers should be expanded to enable cellular therapies to be part of medical practice.

The author discusses a study which shows the sex differences in tissue resident immune cells. She notes that the paper indicates that the levels of resident T cells are twice as high compared to males. She says that the findings reveal the efficiency of female innate immunity in dealing with streptococcal infection.