|
|
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.
There are more nerve cells in one human brain than there are stars in the Milky Way.
The average office desk has 400 times more bacteria on it than a toilet.
Pubic lice (crabs) are usually spread through sexual contact. You cannot catch them by using a public toilet.
Most childhood vaccines are 90–99% effective in preventing disease. Side effects are rarely serious.