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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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The most common treatment options for addiction include psychotherapy, support groups, and individual counseling.
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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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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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Most childhood vaccines are 90–99% effective in preventing disease. Side effects are rarely serious.