Electronic cigarettes do not contain tar or carbon monoxide, normal cigarettes do and these are the main causes or cancer.
What people don't understand, or sometimes forget, is the fact that cancer is caused by the tar and carbon monoxide in cigarette smoke. Electronic cigarettes do not involve tar or carbon monoxide.
While nicotine is relatively safe for the majority of people, it should nevertheless be avoided during pregnancy.
It's good to bring this up every now and then because anti-smoking lobby powers are talking non-stop about the negative effects of nicotine. The truth is, science does not support the claim that nicotine is unhealthy. As a matter of fact, numerous research results have indicated benefits for a variety of ailments.