A 25-year-old student from the Ahmadu Bello University case was diagnosed with the Lassa fever ailment at the Lagos University Teaching Hospital (LUTH), Idi-Araba.
The patient was first admitted at a private hospital in Ojokoro area of Lagos State.
Health Minister Isaac Adewole said the patient was responding to treatment.
The minister had,last week,confirmed 40 deaths from a Lassa fever outbreak in parts of the country.
The death toll increased by one with the loss of a patient at the National Hospital,Abuja during the week.