Nigeria: Vaccine drive to tackle risk of polio spread

Some 53 million West African children will be vaccinated against polio in schools, health clinics and their homes over the next month to tackle risks from the paralysing virus in Nigeria. The $67 million campaign, spanning eight countries, aims to increase immunity levels in one of the last strongholds of the disease that the World Health Organisation (WHO) and UNICEF have spent more than 20 years and $6 billion trying to eradicate.