The Nigerian Centre for Disease Control and UN agencies say 2,997 cases have been reported in the states of Zamfara, Katsina, Kebbi, Niger and Sokoto in northwest and north-central Nigeria since the disease surfaced in December.
A statement today says most victims are between 5 and 14.
Some 500,000 doses of vaccine have arrived in Zamfara, where the disease surfaced. But officials say 2 million doses are needed and there's a worldwide shortage for the strain, which inflames the spinal cord and brain.
Meningitis killed 1,100 people and infected more than 10,000 in Nigeria and Niger in 2015.
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