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As many as 20% of Americans have been infected by the fungus known as Histoplasmosis. While most people are asymptomatic or only have slight symptoms, infection can progress to a rapid and potentially fatal superinfection.

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Vaccines prevent between 2.5 and 4 million deaths every year.

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On average, the stomach produces 2 L of hydrochloric acid per day.

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Illicit drug use costs the United States approximately $181 billion every year.

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In 1886, William Bates reported on the discovery of a substance produced by the adrenal gland that turned out to be epinephrine (adrenaline). In 1904, this drug was first artificially synthesized by Friedrich Stolz.

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