A rare outbreak of vaccine-derived form of polio is occuring in Nigeria. Sixety-nine children in the noth have caught the disease from Nigerians that have been immunised.
Scientists at the University of Bath discovered a link between the gene involved in blood vessel formation and the development of some forms of Motor Neurone Disease.
5,000 people at a time suffer with MND in the United Kingdom.
The disease affects men more than women. For every 100,000 people one or two will be newly diagnosed with MND each year.