Esther Okaya has a health problem that is a growing concern in Sub-Saharan Africa: high blood pressure. Gregory Warner/NPR hide caption

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Gregory Warner/NPR

Africans Are Introduced To The Blood Pressure Cuff

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Even if you're under 25, you should still know your blood pressure, a study says. Rudyanto Wijaya/iStockphoto hide caption

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Rudyanto Wijaya/iStockphoto

Some people with only slightly elevated blood pressure might be able to relax a bit, if they're doctors go along new treatment guidelines. iStockphoto hide caption

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A third of Americans have high blood pressure, according to the Centers for Disease Control. Half of them don't have it under control. hide caption

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