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Scientists find new way to freeze blood for longer

7 February 2014 Last updated at 18:19 GMT

Modern medicine relies heavily on supplies of donated blood but at the moment it has to be used within a month or it goes off.

Now researchers at the University of Warwick say they've found a way to freeze and keep blood for as long as doctors want.

The new technique could be of particular help to people with rare blood groups.

David Gregory-Kumar reports.

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