It is true that many people infected with tapeworms maybe unaware of infection due to lack of symptoms.
They are apart of the brainstem
Answer:
Broadly speaking, a risk assessment is the combined effort of:
identifying and analyzing potential (future) events that may negatively impact individuals, assets, and/or the environment (i.e. risk analysis); and
making judgments "on the tolerability of the risk on the basis of a risk analysis" while considering influencing factors (i.e. risk evaluation).
Hope this helped.