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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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Asthma cases in Americans are about 75% higher today than they were in 1980.

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More than 4.4billion prescriptions were dispensed within the United States in 2016.

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If you could remove all of your skin, it would weigh up to 5 pounds.

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About 100 new prescription or over-the-counter drugs come into the U.S. market every year.

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