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According to the CDC, approximately 31.7% of the U.S. population has high low-density lipoprotein (LDL) or "bad cholesterol" levels.

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During pregnancy, a woman is more likely to experience bleeding gums and nosebleeds caused by hormonal changes that increase blood flow to the mouth and nose.

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Cocaine was isolated in 1860 and first used as a local anesthetic in 1884. Its first clinical use was by Sigmund Freud to wean a patient from morphine addiction. The fictional character Sherlock Holmes was supposed to be addicted to cocaine by injection.

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Congestive heart failure is a serious disorder that carries a reduced life expectancy. Heart failure is usually a chronic illness, and it may worsen with infection or other physical stressors.

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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.

Intramuscular drug administration: (c) the needle is inserted at a 90° angle: Source: Pearson Educat Intramuscular drug administration: (c) the needle is inserted at a 90° angle: Source: Pearson Educat
Tracing the Source of a Water-Borne Disease Tracing the Source of a Water-Borne Disease
The proportion of obese and extremely obese adults in the United States has increased over the past The proportion of obese and extremely obese adults in the United States has increased over the past
Crying Frequency in the Early Months In their first months of life, infants often cry for no appare Crying Frequency in the Early Months In their first months of life, infants often cry for no appare
Major Findings of the High Scope Preschool Study High Scope participants showed better academic per Major Findings of the High Scope Preschool Study High Scope participants showed better academic per
Lilly Martin Spenser’s painting, Domestic Happiness (1844), reflects the change in attitudes toward Lilly Martin Spenser’s painting, Domestic Happiness (1844), reflects the change in attitudes toward
Video: Chemical Messengers Animation

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