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Mutant flu

‘Mutant flu’ could lead to more effective vaccine: study

MIAMI: Experiments in lab animals have shown signs of success for a newly engineered flu virus that may lead one day to a more effective vaccine, researchers said Thursday. Trials in humans are still a long way off, but the report in the US journal Science earned praise from experts who described it as a promising first step toward better prevention of the flu. The World Health Organization considers the flu a major public health concern because it infects up to five million people with severe illness each year and…