You should fear riding in or driving a car then. Way more likely to kill you than "incurable TB".
There is always some new "germ" on the horizon to give humanity a scare. Remember SARS? What ever happened to that shit? It was supposed to be the next big epidemic, yet it never really took off. Bird Flu, Swine Flu, and West Nile Virus are just a few of the more recent "epidemics" that never were. I'm not saying we will never experience another epidemic or plague, but just eat healthy and practice good hygiene (which I'm sure you do) and you should be fine. Rmember the "flesh eating bacteria" that killed Jim Henson? Necrotizing Fasciitis! Nasty shit! That kinda scares me!
http://en.wikipedia.org/wiki/Necrotizing_fasciitis