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Pubic lice (crabs) are usually spread through sexual contact. You cannot catch them by using a public toilet.
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 human body produces and destroys 15 million blood cells every second.
Cytomegalovirus affects nearly the same amount of newborns every year as Down syndrome.
The calories found in one piece of cherry cheesecake could light a 60-watt light bulb for 1.5 hours.