Can vaping cause any problems within the body besides addiction? will it show up on a drug test?

It's nicotine vapor. It's basically the same as cigarettes, but without all the harmful chemicals. 

There is no current evidence to show that vaping is bad for you.

Vaping will not become addicting depending on the amount of nicotine you vape a level 3 juice you won't get addicted a level 6 you can get addicted anything higher than level 3 you can get addicted if you vape it enough and vape will never show up on a drug test because they test for things that are illegal

This is true. yes. indeed.