Aster lets out an actual, physical snort through his snout, rather than a telepathic laugh. "Hardly. No, what I can offer you is full immunity from the workings of myself or my siblings, in the physical sense and in the way of mental influence. That admittedly does not cover everything that might happen around here--- my father's doings are out of my hands, as are those of a certain business associate of mine. And of course I can't spare you from the various inconveniences or discomforts that come as side effects. But it does cover this illness. Not only will you be unable to contract it, but any who are violently ill, in a manner of speaking, will find themselves strangely disinterested in you. Same with Sam. It cannot be shared or used to help anyone else, but frankly, they're not your concern, are they?"