It's expensive and blood can only be stored for so long. Easiest to stick with compatible blood types.
There are also loads of other antigens in blood that can cause a reaction. These are just the commonly known ones. So blood should still be cross matched anyway if it isn't an emergency.
It's expensive and blood can only be stored for so long. Easiest to stick with compatible blood types.
There are also loads of other antigens in blood that can cause a reaction. These are just the commonly known ones. So blood should still be cross matched anyway if it isn't an emergency.
And, quite frankly, we actually are getting somewhat close to producible artificial blood, so there's just not a whole lot of need for the investment.
And those artificial blood studies have DARPA money behind them.