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Did you know?
Most childhood vaccines are 90–99% effective in preventing disease. Side effects are rarely serious.
Did you know?
Blood is approximately twice as thick as water because of the cells and other components found in it.
Did you know?
Cyanide works by making the human body unable to use oxygen.
Did you know?
The Romans did not use numerals to indicate fractions but instead used words to indicate parts of a whole.
Did you know?
Cytomegalovirus affects nearly the same amount of newborns every year as Down syndrome.