CD24 and infection: The results confirmed a startling increase in Zika virus production, with the presence of either CD24 variant 1 or 7 increasing viral titers by ~3–4 orders of magnitude compared to the VO controls at Day 2 post-infection (VO produced only 1 x 101 compared to 4 x 104 for variant 1 and 1 x 105 for variant 7).