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The heart is located in the center of the chest, with part of it tipped slightly so that it taps against the left side of the chest.
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Interferon was scarce and expensive until 1980, when the interferon gene was inserted into bacteria using recombinant DNA technology, allowing for mass cultivation and purification from bacterial cultures.
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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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Signs and symptoms of a drug overdose include losing consciousness, fever or sweating, breathing problems, abnormal pulse, and changes in skin color.
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After a vasectomy, it takes about 12 ejaculations to clear out sperm that were already beyond the blocked area.