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Cancer has been around as long as humankind, but only in the second half of the twentieth century did the number of cancer cases explode.
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Multiple sclerosis is a condition wherein the body's nervous system is weakened by an autoimmune reaction that attacks the myelin sheaths of neurons.
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Thyroid conditions cause a higher risk of fibromyalgia and chronic fatigue syndrome.
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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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Today, nearly 8 out of 10 pregnant women living with HIV (about 1.1 million), receive antiretrovirals.