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When blood is exposed to air, it clots. Heparin allows the blood to come in direct contact with air without clotting.
On average, someone in the United States has a stroke about every 40 seconds. This is about 795,000 people per year.
Of the estimated 2 million heroin users in the United States, 600,000–800,000 are considered hardcore addicts. Heroin addiction is considered to be one of the hardest addictions to recover from.
The Centers for Disease Control and Prevention (CDC) was originally known as the Communicable Disease Center, which was formed to fight malaria. It was originally headquartered in Atlanta, Georgia, since the Southern states faced the worst threat from malaria.
In the United States, an estimated 50 million unnecessary antibiotics are prescribed for viral respiratory infections.