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Vaccines prevent between 2.5 and 4 million deaths every year.
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People often find it difficult to accept the idea that bacteria can be beneficial and improve health. Lactic acid bacteria are good, and when eaten, these bacteria improve health and increase longevity. These bacteria included in foods such as yogurt.
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Throughout history, plants containing cardiac steroids have been used as heart drugs and as poisons (e.g., in arrows used in combat), emetics, and diuretics.
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There are approximately 3 million unintended pregnancies in the United States each year.
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The human body produces and destroys 15 million blood cells every second.