What clinical feature of sickle cell disease accounts for the highest number of hospital admissions?

Question

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Vasoocclusion, or the blocking of blood vessels by sickle-shaped red blood cells, is the primary clinical feature of sickle cell disease that leads to hospital admissions. This can cause pain crises, acute chest syndrome, strokes, and other serious complications. While megaloblastic crisis, autosplenectomy, and hand-foot dactylitis are also associated with sickle cell disease, vasoocclusion is the most frequent cause of hospitalization.

What Clinical Feature of Sickle Cell Disease Accounts for the Highest