Chapare virus causes hemorrhagic fever and is a member of the arenavirus family of viruses. It causes Chapare hemorrhagic fever. The only known outbreak of Chapare virus infection occurred in the village of Samuzabeti, Chapare Province, Bolivia, in January 2003. A small number of people were infected. One person died. The specific transmission vector is not known, but is suspected to be a rodent, in keeping with other members of the arenavirus family, which includes the Lassa virus.