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Cancer has been around as long as humankind, but only in the second half of the twentieth century did the number of cancer cases explode.
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Increased intake of vitamin D has been shown to reduce fractures up to 25% in older people.
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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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More than nineteen million Americans carry the factor V gene that causes blood clots, pulmonary embolism, and heart disease.
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Vaccines cause herd immunity. If the majority of people in a community have been vaccinated against a disease, an unvaccinated person is less likely to get the disease since others are less likely to become sick from it and spread the disease.