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- 01 30, 2025
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Many diseases are the result of choice or circumstance: an unhealthy way of life, toxic living conditions or a chance encounter with a virus or bacterium. Others are predestined—because they are written in the genes. Millions of people worldwide suffer from the most common genetic diseases, such as sickle-cell anaemia or thalassemia, two blood disorders. A long tail of rarer conditions each afflict an unfortunate few, who add up to many millions in total.