"Because the blood can be produced with the required quality, clinical trials are set to begin."
Article on http://ow.ly/vMn6Q:
Soon We May Be Mass Producing Human Blood
Researchers in the UK have developed a technique to culture universal type-O blood from stem cells. It’s the first time scientists have manufactured blood to the appropriate quality and safety standards for transfusion into a human being. It’s a breakthrough that could eventually end blood shortages in emergencies.