CD19 and infection: Three months after the third cured malaria infection, B220(+)CD11c(+)low cells in CD19(−) gate accounted for a significantly higher percentage and showed a greater number of cells on day 7 post-infection in infected semi-immune mice than in naïve littermates (2.6 and 1.1%; 491,031 and 149,699, respectively; P < 0.05) (Figure 1B).