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Drying your hands with a paper towel will reduce the bacterial count on your hands by 45–60%.
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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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More than 150,000 Americans killed by cardiovascular disease are younger than the age of 65 years.
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As the western states of America were settled, pioneers often had to drink rancid water from ponds and other sources. This often resulted in chronic diarrhea, causing many cases of dehydration and death that could have been avoided if clean water had been available.
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The immune system needs 9.5 hours of sleep in total darkness to recharge completely.