Notice how the FDA's author conveniently failed to cite (or compare) the number of Adverse Event reports for NRT products, Chantix, other prescrition drugs, OTC drugs, household cleaning products, alcohol, food, cosmetics, toys or many other common household consumer products.
Considering that at least 100 million e-cigarette products have been sold and consumed in the US since 2006, 57 adverse event reports is amazingly low (i.e. less than one in a million).
Also, its important to note that most AE reports are coincidences, and not cause and effect relationships.
For example, if someone is admitted to a hospital with a heart attack, stroke or disease, and if the patient (when filing out an admission form or when being interviewed) reports recent use of an e-cigarette, many doctors (especially those who heard FDA propaganda about e-cigs and/or those who saw FDA's webpage encouraging people to submit AE reports for e-cigs) would report this to FDA as an AE associated with e-cigarettes.