This image was captured during the investigation of a case of Dengue hemorrhagic fever (DHF), in the city of Hodeida, located in the Al Hudaydah Governorate in Yemen. The photograph was submitted by Yemeni Field Epidemiology Training Program (FETP) resident, Dr. Ali Jaawal. DHF is an arboviral disease, transmitted to humans, who are bitten by infected Aedes spp. mosquitoes. The FETP trains workers on the ground to help countries build sustainable capacity for detecting and responding to health threats. The program develops in-country expertise, so that disease outbreaks can be detected locally and prevented from spreading.