Player Embed Code: Download Embed Share DHA Health Surveillance Explorer Defense Health Agency Immunization Healthcare Branch Feb. 19, 2025 | 3:14 An introduction to the DHA’s Health Surveillance Explorer, an innovative application that makes it more efficient and effective to assemble, integrate, and display health surveillance data. This web-based mapping application is developed by the Integrated Biosurveillance (IB) Branch of the Armed Forces Health Surveillance Division.