US to test child bird flu vaccine

What may be the first clinical trial of a vaccine against the deadly strain of bird flu in children is set to take place in the US.

Scientists in St Louis want to test the vaccine, made from an inert form of the potentially lethal H5N1 virus, on 120 children aged between two and nine.

Centre for Clinical Vaccine Control experts say there is no risk and warn the young are more vulnerable to flu.