Close to nature: Green spaces within and around city schools improve the mental development of young children, a study has found.

Contact lenses may increase the risk of eye infections by altering the make-up of bacteria living on the eyeball, research has shown.

The number of Ebola victims in west Africa may "vastly underestimate the magnitude of the outbreak", the World Health Organisation has said.

An Irish-American girl whose fight to qualify for organ donation drew nationwide debate in the US over how organs are allocated, underwent a lung transplant operation last night after a match with an adult donor was made.