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Before a vaccine is licensed in the USA, the Food and Drug Administration (FDA) reviews it for safety and effectiveness. The CDC then reviews all studies again, as well as the American Academy of Pediatrics and the American Academy of Family Physicians. Every lot of vaccine is tested before administration to the public, and the FDA regularly inspects vaccine manufacturers' facilities.
Inotropic therapy does not have a role in the treatment of most heart failure patients. These drugs can make patients feel and function better but usually do not lengthen the predicted length of their lives.
Approximately 500,000 babies are born each year in the United States to teenage mothers.
There are 60,000 miles of blood vessels in every adult human.
In the United States, there is a birth every 8 seconds, according to the U.S. Census Bureau's Population Clock.