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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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Dogs have been used in studies to detect various cancers in human subjects. They have been trained to sniff breath samples from humans that were collected by having them breathe into special tubes. These people included 55 lung cancer patients, 31 breast cancer patients, and 83 cancer-free patients. The dogs detected 54 of the 55 lung cancer patients as having cancer, detected 28 of the 31 breast cancer patients, and gave only three false-positive results (detecting cancer in people who didn't have it).

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The word drug comes from the Dutch word droog (meaning "dry"). For centuries, most drugs came from dried plants, hence the name.

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In 1885, the Lloyd Manufacturing Company of Albany, New York, promoted and sold "Cocaine Toothache Drops" at 15 cents per bottle! In 1914, the Harrison Narcotic Act brought the sale and distribution of this drug under federal control.

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Throughout history, plants containing cardiac steroids have been used as heart drugs and as poisons (e.g., in arrows used in combat), emetics, and diuretics.

Skeletal muscle structure. Skeletal muscle structure.
The respiratory system: nasal cavity, pharynx, larynx, trachea, bronchus, and lung with expanded vie The respiratory system: nasal cavity, pharynx, larynx, trachea, bronchus, and lung with expanded vie
Levels of structure in proteins Levels of structure in proteins
Structure of the H-R Diagram Structure of the H-R Diagram
Structure of a Kerr (Rotating) Black Hole Structure of a Kerr (Rotating) Black Hole
Changes in the Age Structure of the Population, 1950–2050 Changes in the Age Structure of the Population, 1950–2050
Video: Structures that affect circulation - heart and MABP

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