English: In 1994-95 a new virus appeared in Queensland, killing two humans and fifteen horses in two separate outbreaks. In January 1999, another horse, near Cairns, died of the disease. This virus is now called Hendra virus. This transmission electron micrograph shows intact virus and a free-lying nucleocapsid that were isolated from the lung of an affected horse. These were labeled with colloidal gold and the serum from a convalescent human. All magnification bars represent 100 nm. Image produced by Electron Microscopy Unit, Australian Animal Health Laboratory.