In some places, like where I live, rhesus-negative is very rare, 0.2% of the population for O- and B-, 0.1% for A-. It is usually tourists who need the blood an

In some places, like where I live, rhesus-negative is very rare, 0.2% of the population for O- and B-, 0.1% for A-. It is usually tourists who need the blood and the blood banks just don't have it. So we often see calls go out for blood donors when a tourist has a serious injury. If this method to convert blood works it would be very beneficial.