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Asthma is the most common chronic childhood disease in the world. Most children who develop asthma have symptoms before they are 5 years old.
Normal urine is sterile. It contains fluids, salts, and waste products. It is free of bacteria, viruses, and fungi.
Urine turns bright yellow if larger than normal amounts of certain substances are consumed; one of these substances is asparagus.
Blood is approximately twice as thick as water because of the cells and other components found in it.
About 100 new prescription or over-the-counter drugs come into the U.S. market every year.
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