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

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About 3.2 billion people, nearly half the world population, are at risk for malaria. In 2015, there are about 214 million malaria cases and an estimated 438,000 malaria deaths.

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Cyanide works by making the human body unable to use oxygen.

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People often find it difficult to accept the idea that bacteria can be beneficial and improve health. Lactic acid bacteria are good, and when eaten, these bacteria improve health and increase longevity. These bacteria included in foods such as yogurt.

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Most childhood vaccines are 90–99% effective in preventing disease. Side effects are rarely serious.

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