International donations are, however, often hampered by bureaucracy.
So, it would appear I have a wide blood pressure range, or something? In Asia, that proportion is even lower with only about one percent of the population possessing this rare blood type.
Or to put it another way, about 1 in 15 people have O negative blood.
Lets say their ancestors were normal people from a society that lived in the surface.
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The clinical significance of its recognition is that such patients suffer from Rhnull syndrome associated with osmotically fragile red cells called stomatocytes with subsequent chronic haemolytic anaemia of varying degree.