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Most childhood vaccines are 90–99% effective in preventing disease. Side effects are rarely serious.
The B-complex vitamins and vitamin C are not stored in the body and must be replaced each day.
The first documented use of surgical anesthesia in the United States was in Connecticut in 1844.
The Babylonians wrote numbers in a system that used 60 as the base value rather than the number 10. They did not have a symbol for "zero."
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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