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Did you know?
Normal urine is sterile. It contains fluids, salts, and waste products. It is free of bacteria, viruses, and fungi.
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The average office desk has 400 times more bacteria on it than a toilet.
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The immune system needs 9.5 hours of sleep in total darkness to recharge completely.
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The longest a person has survived after a heart transplant is 24 years.
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Asthma attacks and symptoms usually get started by specific triggers (such as viruses, allergies, gases, and air particles). You should talk to your doctor about these triggers and find ways to avoid or get rid of them.