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Drugs are in development that may cure asthma and hay fever once and for all. They target leukotrienes, which are known to cause tightening of the air passages in the lungs and increase mucus productions in nasal passages.
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Approximately 500,000 babies are born each year in the United States to teenage mothers.
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Most childhood vaccines are 90–99% effective in preventing disease. Side effects are rarely serious.
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Drying your hands with a paper towel will reduce the bacterial count on your hands by 45–60%.
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There are over 65,000 known species of protozoa. About 10,000 species are parasitic.