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.