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Author Question: In primary amenorrhea, ____. a. a woman never even begins menstruation b. previously normal ... (Read 68 times) |
In the United States, an estimated 50 million unnecessary antibiotics are prescribed for viral respiratory infections.
Urine turns bright yellow if larger than normal amounts of certain substances are consumed; one of these substances is asparagus.
About 100 new prescription or over-the-counter drugs come into the U.S. market every year.
Many people have small pouches in their colons that bulge outward through weak spots. Each pouch is called a diverticulum. About 10% of Americans older than age 40 years have diverticulosis, which, when the pouches become infected or inflamed, is called diverticulitis. The main cause of diverticular disease is a low-fiber diet.
Interferon was scarce and expensive until 1980, when the interferon gene was inserted into bacteria using recombinant DNA technology, allowing for mass cultivation and purification from bacterial cultures.