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Story highlights Scientists worldwide are seeking improved and universal flu vaccines In one new study, researchers turn to a mutant virus to design a vaccine (CNN) As a  deadly flu season  continues to ravage the United States, scientists are scrambling to find new ways to fight the virus, including building vaccines that offer stronger protection against the most aggressive flu strains and last longer than just one season. One new study offers a novel approach to developing such a vaccine. Scientists have used a mutant influenza A virus to develop a vaccine that gave the immune systems of mice and ferrets a significant boost, according to the study  published in the journal Science  on Thursday. The newly designed vaccine has been tested only in those lab animals, and more research is needed to determine whether it could be used safely and effectively in humans. Yet the researchers hope that, once more studies are conducted, this vac...

Story highlights CDC: seven more children dead from flu bringing total this season to 37 Hospitalizations continuing to increase nationwide (CNN) This year's seemingly   unyielding flu season continues to ravage the entire continental United States, as health authorities track additional deaths and hospitalizations -- and there's more of the season left. Influenza activity continues to be widespread in all states except Hawaii, according to the  weekly flu report released Friday by the US Centers for Disease Control and Prevention. All while, based on the latest data, the flu season has not even peaked yet, said Kristen Nordlund, a spokeswoman for the CDC. Four ways the flu turns deadly   01:39 "Hopefully we're in the peak currently, since the data is a week behind, or that it peaks soon. Regardless, there is a lot of flu activity happening across the country and likely many more weeks to ...