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.
Some doctors believe this happens because people with PNH have bone marrow that is weaker than normal. A person's bone marrow may be weakened because they have aplastic anemia or another bone marrow failure disease. Weakened bone marrow may also result from a mild bone marrow disease that was never diagnosed. If you have had aplastic anemia before, you are more likely to get PNH.