|
|
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.
If you could remove all of your skin, it would weigh up to 5 pounds.
The Romans did not use numerals to indicate fractions but instead used words to indicate parts of a whole.
Multiple experimental evidences have confirmed that at the molecular level, cancer is caused by lesions in cellular DNA.
The first documented use of surgical anesthesia in the United States was in Connecticut in 1844.