As mentioned before, vaping is rather new and there's still a lot of research that needs to be done if we want to know what the long term effects are.
What we do know at this point in time is that cigarettes release over 4,000 chemicals when combusted. When you smoke, you're also exposed to carbon monoxide, which is a carcinogenic agent.
Short term studies have also shown that smokers who switched to vaping saw improvements in their health. At the same time, their families were not exposed to secondhand smoke, which affects non-smokers the same way as smokers.
Also read: Switch to Vaping if You Love Your Family