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Alzheimer's disease affects only about 10% of people older than 65 years of age. Most forms of decreased mental function and dementia are caused by disuse (letting the mind get lazy).
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Bacteria have been found alive in a lake buried one half mile under ice in Antarctica.
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Cancer has been around as long as humankind, but only in the second half of the twentieth century did the number of cancer cases explode.
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A seasonal flu vaccine is the best way to reduce the chances you will get seasonal influenza and spread it to others.
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All adults should have their cholesterol levels checked once every 5 years. During 2009–2010, 69.4% of Americans age 20 and older reported having their cholesterol checked within the last five years.