Answer:
It is a physiological stressor.
Step-by-step explanation:
Stressors are things that cause a state of tension. There are two types: physiological/physical stressors and psychological stressors. The first category refers to the ones that put a strain on our body, such as hot temperatures, chronic illnesses, or diseases like the flu. The second category refers to events, places, people, or things that we consider as negative, such as deadlines or not having time to do something. Due to this, the flu is a physiological stressor..