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Sleep Apnea
Photo: A teenage girl wearing a mask in bed
WALLPAPER
A Richmond, Virginia, teenager wears a CPAP (Continuous Positive Airway Pressure) machine to treat sleep apnea, a condition in which air passage to the lungs is obstructed during sleep. The CPAP pumps air in a continuous stream, easing breathing.
Photograph by Karen Kasmauski

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