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Cytomegalovirus affects nearly the same amount of newborns every year as Down syndrome.
Nearly 31 million adults in America have a total cholesterol level that is more than 240 mg per dL.
In the United States, an estimated 50 million unnecessary antibiotics are prescribed for viral respiratory infections.
Approximately 15–25% of recognized pregnancies end in miscarriage. However, many miscarriages often occur before a woman even knows she is pregnant.
For about 100 years, scientists thought that peptic ulcers were caused by stress, spicy food, and alcohol. Later, researchers added stomach acid to the list of causes and began treating ulcers with antacids. Now it is known that peptic ulcers are predominantly caused by Helicobacter pylori, a spiral-shaped bacterium that normally exist in the stomach.

