title: Emerging viruses.
abstract: Hemorrhagic fever viruses are among the most dangerous biological agents known. New ones are discovered every year, and artificial as well as natural environmental changes are favoring their spread.
mesh_terms: D000818:Animals; D006801:Humans; D012328:RNA Viruses / Q000472:pathogenicity*; D014777:Virus Diseases / Q000175:diagnosis / Q000209:etiology* / Q000517:prevention & control / Q000635:transmission