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Most childhood vaccines are 90–99% effective in preventing disease. Side effects are rarely serious.
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Fungal nail infections account for up to 30% of all skin infections. They affect 5% of the general population—mostly people over the age of 70.
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Cyanide works by making the human body unable to use oxygen.
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As many as 20% of Americans have been infected by the fungus known as Histoplasmosis. While most people are asymptomatic or only have slight symptoms, infection can progress to a rapid and potentially fatal superinfection.
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The heart is located in the center of the chest, with part of it tipped slightly so that it taps against the left side of the chest.