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Scientists say they've found a way to change type A and B donated blood -- which can only be used by people with those types -- into universally usable type O.
If found to be safe and effective on a large scale, the discovery would greatly expand the supply of available blood and might even make shortages a thing of the past, experts said.
"The Red Cross is very interested in and supports this science and looks forward to seeing the clinical data on this," said Dr. Richard Benjamin, chief medical officer at the American Red Cross in Washington, D.C.