Asthma cases in Americans are about 75% higher today than they were in 1980.
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About one in five American adults and teenagers have had a genital herpes infection—and most of them don't know it. People with genital herpes have at least twice the risk of becoming infected with HIV if exposed to it than those people who do not have genital herpes.
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Malaria was not eliminated in the United States until 1951. The term eliminated means that no new cases arise in a country for 3 years.
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Giardia is one of the most common intestinal parasites worldwide, and infects up to 20% of the world population, mostly in poorer countries with inadequate sanitation. Infections are most common in children, though chronic Giardia is more common in adults.
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The familiar sounds of your heart are made by the heart's valves as they open and close.
The research methods that sociologists choose depend partially on the questions they want to answer. ...
Leonardo da Vinci, Study for a Sleeve.
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Martorano's cross-sectional study
Results from Kliegl's study show that older adults can learn complex information-processing
The study of how traits such as flower color are passed from generation to generation provided the m