Time of Zika Entry (IMAGE) Broad Institute of MIT and Harvard Caption By analyzing genomes generated as part of the study, researchers confirmed that the Zika virus was present in affected countries well before the first confirmed cases were detected. Credit Broad Institute of MIT and Harvard Usage Restrictions Image may only be used with appropriate credit. License Licensed 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.