Fig. 4: Anti-ZIKV IgM levels.

a whole viral antigen ELISA and b anti-NS-1 binding antibody levels to anti-Zika IgM expressed as a ratio. Arrows indicate time of administration of ZIKV_PRVABC59 at day 0. Treatment macaques (Group A) are depicted in green and challenge controls (Group B) in red. Arrow indicates administration of the virus.