Obliged, when called upon, to answer (for one’s deeds); answerable.
Liable to be called on to render an account.
Capable of being accounted for; explicable; explainable.
Obliged to keep accurate records (of property or funds).
A person who is not susceptible to infection by a particular disease
Exempt; not subject to.
Not vulnerable.
Of or pertaining to the immune system.
Protected by inoculation, or due to innate resistance to pathogens.
To make immune.