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Autoimmune diseases occur when the immune system destroys its own healthy tissues. When this occurs, white blood cells cannot distinguish between pathogens and normal cells.
Cocaine was isolated in 1860 and first used as a local anesthetic in 1884. Its first clinical use was by Sigmund Freud to wean a patient from morphine addiction. The fictional character Sherlock Holmes was supposed to be addicted to cocaine by injection.
On average, someone in the United States has a stroke about every 40 seconds. This is about 795,000 people per year.
Urine turns bright yellow if larger than normal amounts of certain substances are consumed; one of these substances is asparagus.
A seasonal flu vaccine is the best way to reduce the chances you will get seasonal influenza and spread it to others.