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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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There are over 65,000 known species of protozoa. About 10,000 species are parasitic.
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The oldest recorded age was 122. Madame Jeanne Calment was born in France in 1875 and died in 1997. She was a vegetarian and loved olive oil, port wine, and chocolate.
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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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A seasonal flu vaccine is the best way to reduce the chances you will get seasonal influenza and spread it to others.