(I asked the same at medicalsciences beta, but I expect a quite different perspective on it here)
This is about bacteria that can infect humans, and their multi-resistance.
The evolution of bacteria to be resistant against antibiotics is certainly a trait that is helpful for the bacteria, and there is not much evolutionary pressure to loose it. We will always hope that the next best antibiotic will help against a given infection, giving the bacteria a chance to get immune against the next as soon as we lost the battle for the previous one.
Does that deterministically add up to all bacteria being resistent against all antibiotics in some point in time?
Or is there reason to assume that we can find new antibiotics fast enough to outrun bacteria evolution? I assume it's not, because evolution will not stop, and there is a finite number of antibiotics, I would expect.
(Or is there reason to believe that we become extinct before all bacteria become resistant, so we do not need to worry about bacteria?)