CD8A and infection: In point of fact, when mice were challenged i.c. during the expansion phase, ZIKV-specific CD8 T cells were found to robustly recruit to the site of infection already on day 2 post i.c. When the i.c. challenge was performed during the memory phase, ZIKV-specific CD8 T cells were also recruited to the brain on day 2 post i.c, but at a significantly lower rate, probably due to the limited numbers of circulating ZIKV-specific CD8 T cells at that time point.