Asthma is a big cause of school absences and can cause parents to miss work, too. AJPhoto/Science Source hide caption

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Hereford, Texas, may have lovely vistas, but it's notably short of mental health care options. Kirk Kittell/Flickr hide caption

toggle caption Kirk Kittell/Flickr

The rupture of a weakened portion of blood vessel (the dark blue spot in this brain scan of a 68-year-old woman) can prompt bleeding and death of brain tissue — a stroke. Simon Fraser/Science Source hide caption

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