Zika and Dengue Overlap (IMAGE) La Jolla Institute for Immunology Caption Zika and dengue overlap in many regions of the world. Credit Courtesy of La Jolla Institute for Allergy and Immunology Usage Restrictions None 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.