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In 1835 it was discovered that a disease of silkworms known as muscardine could be transferred from one silkworm to another, and was caused by a fungus.
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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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In most cases, kidneys can recover from almost complete loss of function, such as in acute kidney (renal) failure.
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In the United States, an estimated 50 million unnecessary antibiotics are prescribed for viral respiratory infections.
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Multiple experimental evidences have confirmed that at the molecular level, cancer is caused by lesions in cellular DNA.