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Vaccines prevent between 2.5 and 4 million deaths every year.
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More than 34,000 trademarked medication names and more than 10,000 generic medication names are in use in the United States.
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Sperm cells are so tiny that 400 to 500 million (400,000,000–500,000,000) of them fit onto 1 tsp.
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A recent study has found that following a diet rich in berries may slow down the aging process of the brain. This diet apparently helps to keep dopamine levels much higher than are seen in normal individuals who do not eat berries as a regular part of their diet as they enter their later years.
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After a vasectomy, it takes about 12 ejaculations to clear out sperm that were already beyond the blocked area.