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Did you know?
About one in five American adults and teenagers have had a genital herpes infection—and most of them don't know it. People with genital herpes have at least twice the risk of becoming infected with HIV if exposed to it than those people who do not have genital herpes.
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Blood is approximately twice as thick as water because of the cells and other components found in it.
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If all the neurons in the human body were lined up, they would stretch more than 600 miles.
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The B-complex vitamins and vitamin C are not stored in the body and must be replaced each day.
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Autoimmune diseases occur when the immune system destroys its own healthy tissues. When this occurs, white blood cells cannot distinguish between pathogens and normal cells.