Nigeria, Sept. 4 -- Mr Ambrose was at home after a busy day at his mechanics' workshop. He had just sat down to have his meal of Eba and Egwusi soup that Mama Favour had prepared for him when he felt his right hand was a little numb.

He quickly stretched it out and massaged his forearm thinking of the long time it took for him to unscrew the top cylinder he had worked on that day.

As he raised his arm to wash his hands in the bowl eight-year-old Favour had presented, he found himself unable to lift his hand and felt a strange sense of dizziness. That was the last he remembered.

Mr Ambrose slumped and fell off the chair sending his soup and water flying all over the floor and nearby walls. As Mama Favour screamed for help neighbours rus...