CD4 and infection: Unexpectedly, there was no significant difference in the number of Ly6C + CD11b + cells (Figure 1—figure supplement 2B), NK cells (Figure 1—figure supplement 2C), total CD4 (Figure 1—figure supplement 2D), or CD8 T cells (Figure 1—figure supplement 2E) that were recruited to the vagina over the first 6 days after infection regardless of whether neutrophils were present or not.