A collection of collections that describe an individual as being either vaccinated or unvaccinated against some particular disease or virus. This is a strange collection, as one cannot simply be vaccinated or unvaccinated. Rather, one must be vaccinated or unvaccinated against some particular ailment condition. Unless the ailment in question is clear from the context one should not use the binary Has Physiological Feature to ascribe vaccination status. Rather, one should use a ternary predicate that relates an organism an ailment condition and a vaccination status such that the relation holds just in case the organism has that status with respect to the ailment condition.