Zika virus vaccine candidate (ZPIV) (IMAGE) Texas Biomedical Research Institute Caption Vial of the Zika virus vaccine (ZPIV) candidate developed by a team at Walter Reed Army Institute of Research. Credit WRAIR Usage Restrictions Free to use with image credit. License Original content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.