The D4 Assay and D4Scope (IMAGE) Duke University Caption Krystle Agans tests the D4 assay and the D4Scope in a BSL-4 lab at the Galveston National Laboratory at the University of Texas Medical Branch at Galveston. Credit Krystle Agans, Galveston National Laboratory, University of Texas Medical Branch at Galveston Usage Restrictions With 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.