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anemia

Plump red blood cells — tumbling amid infection-fighting white blood cells and purple platelets in this colorized, microscopic view — need adequate levels of iron to be able to carry and deliver oxygen around the body. Iron-deficiency anemia is sometimes remedied with IV iron infusions — and the bill can vary by thousands of dollars. Science Source hide caption

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Science Source

Researchers used a gene-carrying virus to fix blood stem cells that were then used to treat patients with beta-thalassemia. Power and Syred/Science Photo Library/Getty Images hide caption

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Power and Syred/Science Photo Library/Getty Images

Indian female farmers sow paddy in a field during monsoon season near Allahabad on July 19, 2014. The monsoon rains, which usually hit India from June to September, are crucial for farmers whose crops feed hundreds of millions of people. Sanjay Kanojia/AFP/Getty Images hide caption

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Sanjay Kanojia/AFP/Getty Images

Anemic patients did not know about their condition during a testosterone trial. Renphoto/Getty Images hide caption

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Renphoto/Getty Images

Researchers Failed To Tell Testosterone Trial Patients They Were Anemic

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What should parents be told before their premature infants participate in a clinical study? iStockphoto.com hide caption

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iStockphoto.com

A man prepares an aye-aye, a rare type of lemur found only on the island of Madagascar, for dinner. These primates are an important source of iron and protein despite being critically endangered. Christopher Golden hide caption

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Christopher Golden