Secondhand vape exposure: Risks and side effects Which Smoking Habit Puts You Most at Risk? Vaping water: Is it a safe alternative to traditional e liquid? Vaping isn't just vapor. It's an aerosol filled with nicotine and chemicals that go deep into your lungs and straight into your bloodstream. Many vapes contain: Highly addictive nicotine Just How Harmful Is Vaping? More Evidence Is Emerging. The New York Times