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.
Did you know?
In 2012, nearly 24 milliion Americans, aged 12 and older, had abused an illicit drug, according to the National Institute on Drug Abuse (NIDA).
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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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People with high total cholesterol have about two times the risk for heart disease as people with ideal levels.
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Between 1999 and 2012, American adults with high total cholesterol decreased from 18.3% to 12.9%
The double-stranded structure of DNA
Pocket gophers and ecosystem structure (data from Huntly and Inouye 1988).