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.
Paroxysmal Nocturnal Hemoglobinuria Causes. The main reason behind the occurrence of PNH is the mutation in the single stem cell gene named PIG-A. The gene is located on the X-chromosome in oneâs bone marrow. The exact reasons responsible for triggering this gene mutation are not known yet.