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Most childhood vaccines are 90–99% effective in preventing disease. Side effects are rarely serious.
More than 150,000 Americans killed by cardiovascular disease are younger than the age of 65 years.
Signs and symptoms of a drug overdose include losing consciousness, fever or sweating, breathing problems, abnormal pulse, and changes in skin color.
Cyanide works by making the human body unable to use oxygen.
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.