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Did you know?
Cytomegalovirus affects nearly the same amount of newborns every year as Down syndrome.
Did you know?
Bacteria have flourished on the earth for over three billion years. They were the first life forms on the planet.
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Everyone has one nostril that is larger than the other.
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Elderly adults are living longer, and causes of death are shifting. At the same time, autopsy rates are at or near their lowest in history.
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Most childhood vaccines are 90–99% effective in preventing disease. Side effects are rarely serious.