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Author Question: Many common sayings about the weather, such as red sky at morning, sailor take warning; red sky at ... (Read 121 times) |
Cytomegalovirus affects nearly the same amount of newborns every year as Down syndrome.
On average, someone in the United States has a stroke about every 40 seconds. This is about 795,000 people per year.
Egg cells are about the size of a grain of sand. They are formed inside of a female's ovaries before she is even born.
Vampire bats have a natural anticoagulant in their saliva that permits continuous bleeding after they painlessly open a wound with their incisors. This capillary blood does not cause any significant blood loss to their victims.
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.