CD8A and Zika virus infectious disease: In DENV-immune dams, anti-CD8 Ab treatment resulted in a greater percentage of ZIKV infection in placentas with decidua and fetal heads and bodies compared with isotype control Ab treatment, with 100% versus 74% in placentas with decidua, 69% versus 37% in fetal heads, and 82% versus 44% in fetal bodies.