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Vaccines prevent between 2.5 and 4 million deaths every year.
If all the neurons in the human body were lined up, they would stretch more than 600 miles.
Sperm cells are so tiny that 400 to 500 million (400,000,000–500,000,000) of them fit onto 1 tsp.
Approximately 25% of all reported medication errors result from some kind of name confusion.
Women are 50% to 75% more likely than men to experience an adverse drug reaction.
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