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U.S. FDA approves 2 sickle cell gene therapies in medical breakthrough

In an exciting medical breakthrough, the U.S. Food and Drug Administration (FDA) has approved two sickle cell treatments, including the first to use gene-editing tool CRISPR. Hundreds of thousands of people around the world — mostly people of colour — live with this painful condition that shortens a person's lifespan. Farah Nasser explains how the new therapy works, and what else it could be used for.