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Author Question: What happens in free association? (Read 23 times) |
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.
When blood is exposed to air, it clots. Heparin allows the blood to come in direct contact with air without clotting.
On average, the stomach produces 2 L of hydrochloric acid per day.
Urine turns bright yellow if larger than normal amounts of certain substances are consumed; one of these substances is asparagus.
Asthma is the most common chronic childhood disease in the world. Most children who develop asthma have symptoms before they are 5 years old.