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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.
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Since 1988, the CDC has reported a 99% reduction in bacterial meningitis caused by Haemophilus influenzae, due to the introduction of the vaccine against it.
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Earwax has antimicrobial properties that reduce the viability of bacteria and fungus in the human ear.
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On average, someone in the United States has a stroke about every 40 seconds. This is about 795,000 people per year.
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Your heart beats over 36 million times a year.