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Most childhood vaccines are 90–99% effective in preventing disease. Side effects are rarely serious.
More than 34,000 trademarked medication names and more than 10,000 generic medication names are in use in the United States.
When blood is exposed to air, it clots. Heparin allows the blood to come in direct contact with air without clotting.
Patients who have been on total parenteral nutrition for more than a few days may need to have foods gradually reintroduced to give the digestive tract time to start working again.
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.