A grey-headed flying fox. © Mike Lehmann, CC BY-SA 3.0, via Wikimedia Commons Australian scientists have identified a new strain of the deadly Hendra virus that was the cause of a previously unexplained horse death in September 2015. The newly recognised variant, identified by the Australian veterinarian-led research project, ‘Horses as Sentinels’, had not been detected previously by routine biosecurity testing in horses. The new strain shares ~99% sequence identity with the 2015 horse case strain, and has been detected in grey-headed flying fox samples from Adelaide, South Australia, in...