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Drugs are in development that may cure asthma and hay fever once and for all. They target leukotrienes, which are known to cause tightening of the air passages in the lungs and increase mucus productions in nasal passages.

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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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By definition, when a medication is administered intravenously, its bioavailability is 100%.

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In the ancient and medieval periods, dysentery killed about ? of all babies before they reach 12 months of age. The disease was transferred through contaminated drinking water, because there was no way to adequately dispose of sewage, which contaminated the water.

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Blood in the urine can be a sign of a kidney stone, glomerulonephritis, or other kidney problems.

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