British scientists are on the verge of producing a revolutionary flu vaccine that works against all major types of the disease. Described as the 'holy grail' of flu vaccines, it would protect against all strains of influenza A - the virus behind both bird flu and the nastiest outbreaks of winter flu. Just a couple of injections could give long-lasting immunity - unlike the current vaccine which has to be given every year. The brainchild of scientists at Cambridge biotech firm Acambis, working with Belgian researchers, the vaccine will be tested on humans for the first time in the next few months.
A similar universal flu vaccine, being developed by Swiss vaccine firm Cytos Biotechnology, could also be tested on people in 2007 - and the vaccines on the market in around five years.