An estimated 17m people in four states are targeted for vaccination in the second phase of a campaign to eliminate cerebrospinal meningitis in December, Bello Aladie, CSM officer at the National Primary Health Care Development Agency, has said. Aladie said yesterday in Abuja that the vaccination will cover vulnerable populations aged one to 29 years in Yobe, Kano, Sokoto and Borno and all states marked as high risk for CSM. He said the campaign will require 17 million doses of the vaccine from a pharmaceutical firm, Serum Institute of India.