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Adult head lice are gray, about ? inch long, and often have a tiny dot on their backs. A female can lay between 50 and 150 eggs within the several weeks that she is alive. They feed on human blood.
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Human stomach acid is strong enough to dissolve small pieces of metal such as razor blades or staples.
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Congestive heart failure is a serious disorder that carries a reduced life expectancy. Heart failure is usually a chronic illness, and it may worsen with infection or other physical stressors.
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Green tea is able to stop the scent of garlic or onion from causing bad breath.
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Most childhood vaccines are 90–99% effective in preventing disease. Side effects are rarely serious.