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Did you know?
There are more bacteria in your mouth than there are people in the world.
Did you know?
The U.S. Preventive Services Task Force recommends that all women age 65 years of age or older should be screened with bone densitometry.
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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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Most childhood vaccines are 90–99% effective in preventing disease. Side effects are rarely serious.
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More than 150,000 Americans killed by cardiovascular disease are younger than the age of 65 years.