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Vaccines prevent between 2.5 and 4 million deaths every year.
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During the twentieth century, a variant of the metric system was used in Russia and France in which the base unit of mass was the tonne. Instead of kilograms, this system used millitonnes (mt).
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On average, someone in the United States has a stroke about every 40 seconds. This is about 795,000 people per year.
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Warfarin was developed as a consequence of the study of a strange bleeding disorder that suddenly occurred in cattle on the northern prairies of the United States in the early 1900s.
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A seasonal flu vaccine is the best way to reduce the chances you will get seasonal influenza and spread it to others.