The Lassa fever outbreak in Nigeria has killed 101 people since August, the country's health authorities said Saturday.
Statistics issued by the Nigeria Centre for Disease Control (NCDC) also showed that 175 confirmed or suspected cases are currently under observation.
The cases spread across 19 out of Nigeria's 36 federal states.
The Lassa virus is transmitted to humans from contact with food or household items contaminated with rodent excretions.
Victims carrying the virus, endemic in the rodent population in parts of West Africa, have symptoms of fever, weakness, headaches, vomiting and diarrhoea.
The first confirmed case of the disease was in 1969, in Lassa village in Nigeria's Borno State. The number of cases peaked in 2012, when 1,723 cases with 112 fatalities were recorded.