Nigeria to immunise 4.6 million children against polio (AFP)

Healthworker gives a child a Vitamin A supplement at a public health centre in Lagos in 2006. Nigerian health workers have begun house-to-house immunization of 4.6 million children under the age of five in the northern state of Kano in a new drive to eradicate the disease.(AFP/File/Pius Utomi Ekpei)AFP - Nigerian health workers Saturday began house-to-house immunization of 4.6 million children under the age of five in the northern state of Kano in a new drive to eradicate the disease.