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There are over 65,000 known species of protozoa. About 10,000 species are parasitic.
Nearly 31 million adults in America have a total cholesterol level that is more than 240 mg per dL.
A cataract is a clouding of the eyes' natural lens. As we age, some clouding of the lens may occur. The first sign of a cataract is usually blurry vision. Although glasses and other visual aids may at first help a person with cataracts, surgery may become inevitable. Cataract surgery is very successful in restoring vision, and it is the most frequently performed surgery in the United States.
Today, nearly 8 out of 10 pregnant women living with HIV (about 1.1 million), receive antiretrovirals.
Increased intake of vitamin D has been shown to reduce fractures up to 25% in older people.