NASA Satellite Image of Iquitos, Peru (IMAGE) Emory Health Sciences Caption Dengue fever is common in Iquitos, Peru, a densely packed city surrounded by the Amazon. With the imminent arrival of Zika virus to Iquitos, the researchers expect that the data they have collected on dengue transmission will also add to the understanding of how Zika and chikungunya spread through a population. Credit NASA image Usage Restrictions Must include 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.