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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.
Eating carrots will improve your eyesight. Carrots are high in vitamin A (retinol), which is essential for good vision. It can also be found in milk, cheese, egg yolks, and liver.
Human kidneys will clean about 1 million gallons of blood in an average lifetime.
Bacteria have been found alive in a lake buried one half mile under ice in Antarctica.
The people with the highest levels of LDL are Mexican American males and non-Hispanic black females.