Antique Perfume

Using this skill makes Frieda gain the Immunized status and therefore immune to all forms of spore transmission including 'Do the thing'

should not need to shower regularly, however, nor spend her time anywhere away from a (dorm and bridge are usually surveilled), so it will not be much of a benefit when used passively.

It can be useful if is inactive or dead to actively remove traps or eat dubious food. But acting as a bait is unrealistic, as they would have to be stupid enough to overlook the  Symbol.

Another use is to shower right before an expedition that carries the risk of mush traps, as any risk of infection would be negated while the skill is active.