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Acute bronchitis is an inflammation of the breathing tubes (bronchi), which causes increased mucus production and other changes. It is usually caused by bacteria or viruses, can be serious in people who have pulmonary or cardiac diseases, and can lead to pneumonia.

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The strongest synthetic topical retinoid drug available, tazarotene, is used to treat sun-damaged skin, acne, and psoriasis.

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Today, nearly 8 out of 10 pregnant women living with HIV (about 1.1 million), receive antiretrovirals.

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The B-complex vitamins and vitamin C are not stored in the body and must be replaced each day.

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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.

Lion and Tiger Fighting by James Ward, 1797 Lion and Tiger Fighting by James Ward, 1797
Frederick Douglass, having escaped from slavery in 1836, attracted large audiences as an antislavery Frederick Douglass, having escaped from slavery in 1836, attracted large audiences as an antislavery
Chinese workers on a railway in the far West. “Without them,” Leland Stanford, president of the Cent Chinese workers on a railway in the far West. “Without them,” Leland Stanford, president of the Cent
President-elect Barack Obama, his daughters, and wife, Michelle, celebrate his victory in November 2 President-elect Barack Obama, his daughters, and wife, Michelle, celebrate his victory in November 2
School is over—but not for this student. After the regular school day, hundreds of thousands in ... School is over—but not for this student. After the regular school day, hundreds of thousands in ...
A sample of work by a Grade 4 student with a specific learning disorder A sample of work by a Grade 4 student with a specific learning disorder
Video: Humerus Adduction Animation

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