Illness on Pandora?

[Empty Glass]

I'm sure there's better examples than this, but I know that something of the sort was mentioned in Project 880:

It's not all grim here, he says. As of today you will never get another cold or flu. We don't get them here. Pandora has somehow reacted to the introduction of our viruses by creating a countervirus for each which wipes them out. In fact, the Consortium has the patents on these counterviruses, and when the FDA approves them, everybody on Earth will be buying them. That's the sort of thing we're looking for here. So please stay alert to the commercial possibilities of your research.