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Most childhood vaccines are 90–99% effective in preventing disease. Side effects are rarely serious.

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Women are two-thirds more likely than men to develop irritable bowel syndrome. This may be attributable to hormonal changes related to their menstrual cycles.

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More than 4.4billion prescriptions were dispensed within the United States in 2016.

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More than 34,000 trademarked medication names and more than 10,000 generic medication names are in use in the United States.

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Amoebae are the simplest type of protozoans, and are characterized by a feeding and dividing trophozoite stage that moves by temporary extensions called pseudopodia or false feet.

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