
The disease, in which red blood cells take on a crescent or sickle shape, blocking blood flow, is one of the most common genetic disorders and is more likely to affect people of African or Middle Eastern descent. Read more...

The disease, in which red blood cells take on a crescent or sickle shape, blocking blood flow, is one of the most common genetic disorders and is more likely to affect people of African or Middle Eastern descent. Read more...
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