3,959 cases of meningitis, 181 laboratory confirmed, resulting in 438 deaths have been reported as of 5 April. While 19 states have reported outbreaks, 97% of reported cases are in six states: Katsina, Kebbi, Niger, Sokoto, Yobe, and Zamfara. Meningitis serotype C, or NmC, is responsible for 83% of laboratory confirmed cases and is severely undervaccinated in the affected areas. Additionally, vaccines for NmC is very costly at USD 50 per dose. Both this cost and local health capacity has limited response thus far.