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Did you know?
Not getting enough sleep can greatly weaken the immune system. Lack of sleep makes you more likely to catch a cold, or more difficult to fight off an infection.
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More than 2,500 barbiturates have been synthesized. At the height of their popularity, about 50 were marketed for human use.
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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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The average human gut is home to perhaps 500 to 1,000 different species of bacteria.
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The heart is located in the center of the chest, with part of it tipped slightly so that it taps against the left side of the chest.