For several weeks starting in early March, meningitis, an extremely infectious and deadly disease, spread rapidly throughout several states across Northwest Nigeria. In Kebbi State only – where most cases were reported – hundreds of patients were admitted for care in MSF-supported facilities. Providing early care is vital to avoid high levels of mortality. It is estimated that up to 80 percent of patients may die without early access to the treatment. MSF teams mobilised quickly in Kebbi State to offer care and conducted a mass vaccination campaign in April with health authorities to prevent the emergence of new cases and other widespread diseases. At the end of the campaign, 474,462 people between 1 and 29 years were vaccinated against meningitis, 30% of those were children aged 1 to 5. In addition, 115,143 children aged between 1 and 5 were vaccinated against measles.