hierarchy - a series of ordered groupings of people or things within a system; put honesty first in her hierarchy of values. 1  celestial hierarchy - the collective body of angels. 2  data hierarchy - an arrangement of data consisting of sets and subsets such that every subset of a set is of lower rank than the set. taxonomy - a classification of organisms into groups based on similarities of structure or origin etc.
No, elevated blood pressure is not a known side effect of the flu vaccine. Other things, such as pain, can cause your blood pressure to rise.
However, it would be wrong to say that this rise in blood pressure cannot be dangerous, because if you have heart disease it's important to keep a healthy heart rate. Anxiety can cause a rapid heartbeat, which leads to higher blood pressure and could in theory exacerbate a heart condition.