Answer:
Most likely, she is using it correctly.
Explanation:
I'm assuming from the portion of the sentence that was given that she was referring to some kind of disease or sickness that affects dogs and possibly other organisms.
The life lesson that could be learned from this chapter is that when facing with a difficult situation or a crisis, we should overcome terror or fear in order to make a decision and take action. It might be implied that sometimes a person can succeed and other can fail but there is always a choice.
