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The top five reasons that children stay home from school are as follows: colds, stomach flu (gastroenteritis), ear infection (otitis media), pink eye (conjunctivitis), and sore throat.
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Cytomegalovirus affects nearly the same amount of newborns every year as Down syndrome.
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Bacteria have flourished on the earth for over three billion years. They were the first life forms on the planet.
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Intradermal injections are somewhat difficult to correctly administer because the skin layers are so thin that it is easy to accidentally punch through to the deeper subcutaneous layer.
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Women are 50% to 75% more likely than men to experience an adverse drug reaction.