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Increased intake of vitamin D has been shown to reduce fractures up to 25% in older people.
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Approximately one in three babies in the United States is now delivered by cesarean section. The number of cesarean sections in the United States has risen 46% since 1996.
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Today, nearly 8 out of 10 pregnant women living with HIV (about 1.1 million), receive antiretrovirals.
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The average human gut is home to perhaps 500 to 1,000 different species of bacteria.
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There are over 65,000 known species of protozoa. About 10,000 species are parasitic.