CD8A and infection: Similarly, adoptive transfer of ∼107 activated specific CD8+ T cells, which totalize ∼26 to 60% of CD8+ T cells circulating in the blood, is required to sterilize the infection in the liver, while the transfer of 106 CD8+ T cells, which represents ∼3% of CD8+ T cells circulating in the blood, is not enough to completely protect mice against sporozoite challenge (Kimura et al., 2013).