Confidence votes 11. According to Wikipedia, the width of the Atlantic Ocean at its narrowest point is 2,848 kilometers (1,770 mi) between Brazil and Sierra Leone.
Paroxysmal nocturnal hemoglobinuria (PNH) may cause unpredictable episodes of acute red blood cell destruction (hemolysis). This occurs when a part of your immune system called complement attacks red blood cells that lack certain protective proteins.
Causes of PNH. PNH happens because of a change (mutation) in the PIG-A gene of a single stem cell in your bone marrow. This gene controls the creation of substance that helps certain proteins to stick to blood cells. Therefore, any blood cells created by this mutant bone marrow stem cell are abnormal.