after cigarette effects Here's What Happens to Your Body When You Quit Smoking — A Timeline Quitting Timeline of Lung Recovery After
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Premature Aging: Smoking can cause memory problems and dementia later in life and premature skin damage, like wrinkles
After two weeks, they were able to be 85% accurate

Ozone Formation Potential of Ambient Volatile Organic Compounds at Roadside in Bangkok, Thailand
Effect of ammonia in cigarette tobacco on nicotine absorption in human smokers

Plus vaping provides a slower release of nicotine compared to smoking, so you may feel like you need to vape either more, or a higher nicotine strength to make up for it