> 100 million times do you know how many bacteria, all mutating and swapping genes, there are out there? also, dual therapy, particularly for TB has been used for years, but TB is still with us.
1/4 people carry TB in the world. Most asymptomatic.
TB been with humans as long as humans have been around, and it will be with humans as long as we're here.
Multidrug Resistent TB is a thing though.