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In 1864, the first barbiturate (barbituric acid) was synthesized.

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Pubic lice (crabs) are usually spread through sexual contact. You cannot catch them by using a public toilet.

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Only one in 10 cancer deaths is caused by the primary tumor. The vast majority of cancer mortality is caused by cells breaking away from the main tumor and metastasizing to other parts of the body, such as the brain, bones, or liver.

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Before a vaccine is licensed in the USA, the Food and Drug Administration (FDA) reviews it for safety and effectiveness. The CDC then reviews all studies again, as well as the American Academy of Pediatrics and the American Academy of Family Physicians. Every lot of vaccine is tested before administration to the public, and the FDA regularly inspects vaccine manufacturers' facilities.

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Blastomycosis is often misdiagnosed, resulting in tragic outcomes. It is caused by a fungus living in moist soil, in wooded areas of the United States and Canada. If inhaled, the fungus can cause mild breathing problems that may worsen and cause serious illness and even death.

Early in the twentieth century, when malnutrition was common, companies such as this one advertised Early in the twentieth century, when malnutrition was common, companies such as this one advertised
John Ahearn, Homage to the People of the South Bronx: Double Dutch at Kelly Street 1: Frieda, ... John Ahearn, Homage to the People of the South Bronx: Double Dutch at Kelly Street 1: Frieda, ...
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Video: Definitions of stroke volume, preload definition & Factors influencing stroke volume

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