QUASR (IMAGE) DOE/Sandia National Laboratories Caption Red means a disease is present to Sandia National Laboratories' researchers Cameron Ball and Robert Meagher as they test their QUASR, for quenching of unincorporated amplification signal reporters, technique to detect the presence of malaria and viruses like West Nile. Simple enough for field labs and handheld devices, QUASR's positive signal is 10 times brighter than a negative signal. Credit Dino Vournas, Sandia National Laboratories 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.