The outbreak of Lassa fever in Nigeria has killed 41 people out of 93 reported cases, Health Minister Isaac Adewole said Tuesday.
Adewole however said the spread of the disease had not gone beyond 10 states of the country, denying reports it had spread to 12 states.
It is said to be the worst outbreak of the virus in Nigeria in the past four years.
Nigeria has informed the World Health Organization of the development and the government is taking measures to curtail further spread of the disease in rural areas, Adewole said, adding no new cases were reported in the last 72 hours.
Lassa fever is an acute and often fatal viral disease, occurring mainly in West Africa. It is usually transmitted by contact with the saliva or excreta of rats accessing homes and food stores.