For all the non scientists out there, the water holding tanks are silver plated (which is a natural disinfecting device), that are also cleaned at regular intervals.

Boiling water also magically kills many pathogenic organisms.

Dreamliners also have a redundant water filtration system built into them, but I have yet to be poisoned by AC's water, and have not heard of any credible instances where people got sick b/c of the potable water on A/C.

You are more likely to infect yourself by rubbing your nose,eyes and/or putting your fingers in your mouth while reading hyperbolic foreign news reports.