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Did you know?
There are more bacteria in your mouth than there are people in the world.
Did you know?
When blood is exposed to air, it clots. Heparin allows the blood to come in direct contact with air without clotting.
Did you know?
Cytomegalovirus affects nearly the same amount of newborns every year as Down syndrome.
Did you know?
More than 2,500 barbiturates have been synthesized. At the height of their popularity, about 50 were marketed for human use.
Did you know?
Most childhood vaccines are 90–99% effective in preventing disease. Side effects are rarely serious.

