Comparison of Nicotine Levels Between Cigarettes and Vapes Ecigator Electronic Cigarettes Pact Coalition E Cigarettes: Flavored Products Fuel Campaign for Tobacco Free Kids UofL study shows nicotine in e cigarettes may not be harmless, as some claim UofL News E cigarettes with a cigarette like level of nicotine are effective in reducing smoking and exposure to carcinogen, study finds VCU News Virginia Commonwealth University