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 or PNH is a rare and chronic disease that results in an abnormal breakdown of red blood cells. PNH is due to a spontaneous genetic mutation that causes red blood cells to be deficient in a protein, leaving them fragile.
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.