@CNN: A global search is underway for seven to 10 blood donors who match a two-year-old with some of the rarest blood in the world. So far, four have been found https://t.co/efJpAHvlu7

@CNN: A global search is underway for seven to 10 blood donors who match a two-year-old with some of the rarest blood in the world. So far, four have been found https://t.co/efJpAHvlu7