27 dez 1985 ano - June 1986 - March 1987
- Outbreak epicentre in Benue State
- Spread through Cross River, Imo and Anambra states
- Epidemiological peak in November
- Spread to SW in Nov, following nomadic movements
- 559 cases and 200 deaths reported
- CFR 36%
- 17 million people vaccinated in SE (Benue, Cross River);
SW (Oyo, Ogun, Ondo, Kwara) and NW (Niger, Sokoto, Kaduna)
- Aedes africans incriminated.
