It is not the lettuce itself, rather, it’s this plucky little shit, E. Coli, more specifically the O157:H7 serotype. The only real risk of death is if you are an infant, elderly, or have a dysfunctional immune system. Lettuce is quite good for you on its own, if you haven’t heard before, so once the bad source has been resolved you shouldn’t continue avoiding consumption. The current outbreaking bacterium can cause some nasty symptoms, but should resolve themselves in as little as 5 days. There’s also the possibility that you could not experience any symptoms and be a carrier anyways.
These kinds of outbreaks regarding vegetable products occur when run-off from animal farms get into the plants. It isn’t the producer’s fault necessarily, and what is more likely is that the nearby farm(s) are at fault.
TL:DR; there’s nothing wrong with the lettuce itself, and any of us are incredibly unlikely to die from this even if we did hit the unfortunate jackpot of being one of the few to even be infected in the first place. We’re likely not in the correct age or health group to have any real worry.