One of Australia's leading mosquito researchers, Associate Professor Greg Devine from QIMR Berghofer Medical Research explains the science behind the most recent outbreak of Japanese Encephalitis Virus.  His research lab is screening mosquito collections from Queensland for viruses of public health importance. The JEV outbreak in several states is the first time the potentially deadly virus has been found outside far northern Australia. JEV has a high fatality rate of 30 per cent, in the very small number of people who develop symptoms. He discusses why a national surveillance network will help predict, detect and manage mosquito-borne diseases.