The problem occurs when people touch or accidentally swallow the liquid nicotine found inside e-cigarettes.
"People do not appreciate the level of toxicity that is present in this e-liquid. This is concentrated nicotine," says Dr. Tim McAfee of the Centers For Disease Control.
As sales of e-cigarettes have risen in recent years so have calls to poison control centers related to that concentrated nicotine, or e-juice as it's sometimes called.
The CDC has released a report finding just one call to a poison center related to e-cigarettes in September 2010. In February 2014 there were 215.
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