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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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It is believed that the Incas used anesthesia. Evidence supports the theory that shamans chewed cocoa leaves and drilled holes into the heads of patients (letting evil spirits escape), spitting into the wounds they made. The mixture of cocaine, saliva, and resin numbed the site enough to allow hours of drilling.
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The longest a person has survived after a heart transplant is 24 years.
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Asthma cases in Americans are about 75% higher today than they were in 1980.
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The most common treatment options for addiction include psychotherapy, support groups, and individual counseling.