The hemoglobin A1C test for blood sugar, a standard assay for diabetes, may not perform as well in people with sickle cell trait, a study finds. fotostorm/Getty Images/iStockphoto hide caption

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fotostorm/Getty Images/iStockphoto

The A1C Blood Sugar Test May Be Less Accurate In African-Americans

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The CRISPR enzyme (green and red) binds to a stretch of double-stranded DNA (purple and red), preparing to snip out the faulty part. Illustration courtesy of Jennifer Doudna/UC Berkeley hide caption

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Illustration courtesy of Jennifer Doudna/UC Berkeley

A CRISPR Way To Fix Faulty Genes

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Red blood cells are normally shaped like doughnuts, but sickle cells (purple) are flattened and clump together. NIH hide caption

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NIH

Sickle Cell Anemia Is On The Rise Worldwide

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Nurse Corean McClinton, left, talks about pain management with Sherry Webb at the Sickle Cell Disease Center in the Truman Medical Center, in Kansas City, Mo., in 2007. Dick Whipple/Associated Press hide caption

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Dick Whipple/Associated Press