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Did you know?
Vaccines prevent between 2.5 and 4 million deaths every year.
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The average office desk has 400 times more bacteria on it than a toilet.
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About 600,000 particles of skin are shed every hour by each human. If you live to age 70 years, you have shed 105 pounds of dead skin.
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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.
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There are more nerve cells in one human brain than there are stars in the Milky Way.