Tobacco and Tattoos = Good for you?

I was looking at the BBC headline news feeds...and saw an article about cancer cures and then linked another article about vaccines...

Tobacco as a cancer cure...

Vaccines delivered by Tattoo Needles

Hey why not? I mean, caffeine is a cause of migraines in a lot of people - yet is also a remedy for them...don't believe me? Take a look at the active ingredients in your friendly little bottle (or in my case extra-economy sized) bottle of Excedrin migraine...

So why shouldn't tobacco work as both a cause and a cure?