Memory T cells: total recall or just a sense of déjà vu?

Is a lifetime of sequential viral infections detrimental or advantageous to the host? New evidence suggests that pre-existing memory T cells specific for one type of virus can alter, for the better, the disease outcome after infection with an unrelated virus.

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Figure 1: Memory CD8+ T cells in heterogolous immunity.

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Karrer, U., Oxenius, A., Phillips, R. et al. Memory T cells: total recall or just a sense of déjà vu?. Nat Immunol 2, 991–993 (2001) doi:10.1038/ni1101-991

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