Color enhanced Transmission Electron Micrograph (TEM) of a section through two Hanta viruses (Hantaan virus). This virus, of the Bunya virus group, causes Korean hemorrhagic fever. Two rounded viruses (blue) are sectioned, the virus at right appearing smaller. Humans obtain the virus by inhaling or ingesting secretions or excreta from infected rodents. The virus incubates for about two weeks. Severe symptoms follow: fever, kidney pain, nausea, hemorrhage and shock. The virus causes blood to leak from blood vessels into the tissues. Renal failure and jaundice may occur. Treatment by renal dialysis may substantially reduce the death rate. Magnification: unknown.