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Did you know?
Vaccines prevent between 2.5 and 4 million deaths every year.
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More than 4.4billion prescriptions were dispensed within the United States in 2016.
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Elderly adults are living longer, and causes of death are shifting. At the same time, autopsy rates are at or near their lowest in history.
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The human body produces and destroys 15 million blood cells every second.
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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.