Immunity for the intracellular phase requires [[Lymphocytes#Cytotoxic CD8+|'''CD8+ cytotoxic T cells''']] and uses the [[Major Histocompatability Complexes#MHC I|MHC class I pathway]].
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Immunity for the intracellular phase requires [[T_cells#Cytotoxic_CD8.2B|CD8+ cytotoxic T lymphocytes (CTL)]] and uses the [[Major Histocompatability Complexes#MHC I|MHC class I pathway]].
*Only live vaccine can be used to get into cells (entering via the endogenous pathway)
*Only live vaccine can be used to get into cells (entering via the endogenous pathway)