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About 100 new prescription or over-the-counter drugs come into the U.S. market every year.
The ratio of hydrogen atoms to oxygen in water (H2O) is 2:1.
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.
The newest statin drug, rosuvastatin, has been called a superstatin because it appears to reduce LDL cholesterol to a greater degree than the other approved statin drugs.
The familiar sounds of your heart are made by the heart's valves as they open and close.