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Sickle cell anemia  is a serious genetic disorder that affects millions of people around the world. It causes red blood cells to take on a rigid, crescent (sickle) shape instead of the usual round shape. These misshapen cells can block blood flow, cause severe pain, and lead to life-threatening complications.  But thanks to new advances in gene editing , a groundbreaking treatment using CRISPR-Cas9 technology  is giving hope to people living with this disease.     What Causes

Every person carries a unique genetic code—a set of instructions that tells our bodies how to grow, function, and repair themselves. Sometimes, however, a small change in that code can have a big impact. These changes, called mutations , can lead to what we know as genetic disorders . What Is a Genetic Disorder? A genetic disorder  is a health condition caused by an abnormality in a person’s DNA. DNA is the blueprint for every cell in the body, so even a small error can disru