We will need to continue gathering samples to confirm this. It may be that this sample is not representative of the entirety of the outside world.

Or, it may be that the toxin also destroys bacteria and other microorganisms.

[Which was kind of worrying, considering the importance of these things. People could not survive without them.]

Perhaps that is why we become ill. Our bodies need such things to function. When one is on antibiotics, it has negative side effects.