Health workers move from door to door in the rural Sumaila district of Kano state, northern Nigeria, administering oral polio vaccines to children under five.
It could be any other vaccination drive but the programme has extra importance in Nigeria, where there has not been a case of the virus since July 24 last year.
As the one-year anniversary approaches without a case, health officials are keen to keep it that way. If successful, Nigeria will be taken off the list of polio-endemic countries.
Fauziyya Ahmed scribbles a code with chalk on the door of a house that she and her team have just visited to indicate the children are now immunised. Read More →
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