Africa is to be declared free from wild polio by the independent body, the Africa Regional Certification Commission. Polio usually affects children under five, sometimes leading to irreversible paralysis. Death can occur when breathing muscles are affected by the paralysis. There is no cure but the polio vaccine protects children for life.
Nigeria is the last African country to be declared free from wild polio, having accounted for more than half of all global cases less than a decade ago.
The vaccination campaign in Nigeria involved a huge effort to reach remote and dangerous places under threat from militant violence and some health workers were killed in the process.
What is polio and has it now been eradicated in Africa?
Polio is a virus which spreads from person to person, usually through contaminated water. It can lead to paralysis by attacking the nervous system.
Two out of three strains of wild polio virus have been eradicated worldwide. On Tuesday, Africa has been declared free of the last remaining strain of wild poliovirus.
More than 95% of Africa’s population has now been immunised. This was one of the conditions that the Africa Regional Certification Commission set before declaring the continent free from wild polio.