<unk>  (LASV) is an arenavirus that causes<unk>  hemorrhagic fever, a type of viral hemorrhagic fever (VHF), in humans and other primates.<unk>  is an emerging virus and a select agent, requiring Biosafety Level 4-equivalent containment. It is endemic in West African countries, especially Sierra Leone, the Republic of Guinea, Nigeria, and Liberia, where the annual incidence of infection is between 300,000 and 500,000 cases, resulting in 5,000 deaths per year. As of 2012 discoveries within the Mano River region of west Africa have expanded the endemic zone between the two known<unk>  endemic regions, indicating that LASV is more widely distributed throughout the tropical wooded savannah ecozone in west Africa. There are no approved vaccines against<unk>  fever for use in humans.
Lassa mammarenavirus
Sepik virus
Chinese virus
Limestone Canyon virus
Bayou orthohantavirus
Rabies virus
Western equine encephalitis virus
California encephalitis orthobunyavirus