unsusceptibility

If this does not occur, that is, if the vaccination does not take, it may be either because the vaccine was not good or because of the unsusceptibility of the person.

That which ought to be men's shame becomes their boast—unsusceptibility of any fresh emotion.

These are the two results achieved by Righteousness, viz., the stainlessness of the soul and unsusceptibility of being touched by Unrighteousness.