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Vaccines prevent between 2.5 and 4 million deaths every year.
People with high total cholesterol have about two times the risk for heart disease as people with ideal levels.
The people with the highest levels of LDL are Mexican American males and non-Hispanic black females.
Bacteria have flourished on the earth for over three billion years. They were the first life forms on the planet.
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.